| Zur Systematik | UB Regensburg | 
| Circuittraining | ZY 1550 - ZY 1559 	  | 
| Cirese, Eugenio | IV 20480 - IV 20481 	  | 
| Čirikov, Evgenij Nikolaevič | KI 3395 - KI 3396 	  | 
| Ćirilov, Jovan | KW 7680 - KW 7681 	  | 
| Ciris | FX 178698 - FX 178705 	  | 
| Cirlot, Juan Eduardo | IP 3504 	  | 
| Cisneros, Antonio | IQ 49920 - IQ 49921 	  | 
| Cisneros, Sandra | HU 3344 - HU 3345 	  | 
| Cissoko, Siriman | IJ 82836 - IJ 82837 	  | 
| Cistellaria | FX 105208 - FX 105215 	  | 
| Cister | LT 12020 - LT 12028 	  | 
| Citati, Pietro | IV 20520 - IV 20521 	  | 
| Citronensäurezyklus | WX 3200 - WX 3239 	  | 
| Civinini, Guelfo | IV 20560 - IV 20561 	  | 
| Civinini, Sergio | IV 20600 - IV 20601 	  | 
| Civita Castellana | LF 2205 	  | 
| Čivrný, Lumír | KS 4060 - KS 4061 	  | 
| Cixous, Hélène | IH 28160 - IH 28161 	  | 
| Cladel, Léon | IG 5820 	  | 
| Cladoniaceae | WL 6400 	  | 
| Cladophoraceae | WL 2940 	  | 
| Cladophorales | WL 2935 	  | 
| Claes, Ernest | GU 63919 - GU 63920 	  | 
| Claes, Heinenzsoon de Ruyris | GU 33140 - GU 33141 	  | 
| Clair, René | AP 51082 	  IH 28200 - IH 28201  | 
| Clairmont, Claire | HL 2396 - HL 2399 	  | 
| Clallam | EE 2895 	  | 
| Clam-Martinic, Heinrich | NP 4885 	  | 
| Clampitt, Amy | HU 3346 - HU 3347 	  | 
| Clancier, Georges Emmanuel | IH 28240 - IH 28241 	  | 
| Clap, Roger | HS 3580 - HS 3585 	  | 
| Claramonte, Andrés de | IO 3650 - IO 3651 	  | 
| Clare, John | HL 2400 - HL 2405 	  | 
| Clarembaldus, Atrebatensis | BN 2180 	  | 
| Claretie, Jules | IG 5821 	  | 
| Claretus | KS 2410 - KS 2411 	  | 
| Clark, George Rogers | NO 2435 	  | 
| Clarke, Arthur C. | HN 2745 - HN 2746 	  | 
| Clarke, Marcus Andrew Hislop | HQ 1328 - HQ 1329 	  | 
| Clarke, Samuel | CF 2560 - CF 2577 	  | 
| Clathrate | VK 7150 - VK 7159 	  | 
| Clauberg, Johann | CF 2600 - CF 2617 	  | 
| Claudel, Camille | LI 22660 	  | 
| Claudel, Paul | IH 28360 - IH 28361 	  | 
| Claudianus, Claudius | FX 334998 - FX 335305 	  NH 3660 - NH 3663  | 
| Claudianus, Epigrammaticus | FH 73848 - FH 73853 	  | 
| Claudianus, Mamertus | FX 276098 - FX 276105 	  NH 7670  | 
| Claudius, Eduard | GN 3790 - GN 3791 	  | 
| Claudius, Friedrich Matthias | GK 3255 - GK 3258 	  | 
| Claudius, Hermann | GM 2845 - GM 2848 	  | 
| Claudius I., Römisches Reich, Kaiser | NH 7350 	  | 
| Claudius II., Römisches Reich, Kaiser | NH 7650 	  | 
| Clausewitz, Carl von | NO 5735 	  | 
| Clavel, Bernard | IH 28400 - IH 28401 	  | 
| Clavel, Maurice | IH 28440 - IH 28441 	  | 
| Clavien, Germain | IH 28480 - IH 28481 	  | 
| Clavigero, Francesco Saverio | IQ 13762 - IQ 13763 	  | 
| Cleaenetus, Tragicus | FH 33748 - FH 33753 	  | 
| Cleanthes, Assius | CD 4940 - CD 4941 	  FH 37798 - FH 37803  | 
| Clearchus, Comicus | FH 33598 - FH 33603 	  | 
| Clearingstelle Kirche und Umwelt (Benediktbeuern) | AN 80065 	  | 
| Cleary, Jon | HQ 1344 - HQ 1345 	  | 
| Clébert, Jean-Paul | IH 28500 - IH 28501 	  | 
| Clemenceau, Georges | IH 28520 - IH 28521 	  | 
| Clemens, Alexandrinus | BO 2832 - BO 2833 	  CD 4950 - CD 4967 DD 5720 - DD 5721 FH 67248 - FH 67253 NH 2470 - NH 2473  | 
| Clemens III., Antipapa, Papa | NV 2578 	  | 
| Clemens non Papa, Jacobus | LP 22910 	  LU 22910  | 
| Clemens, Scotus | FY 20218 - FY 20223 	  | 
| Clemens VII., Antipapa, Papa | NV 2636 	  | 
| Clemens VIII., Antipapa, Papa | NV 2644 	  | 
| Clement, Franz | IH 28600 - IH 28601 	  | 
| Clément, Jean-Baptiste | IG 5822 	  | 
| Clément, René | AP 51083 	  | 
| Clemente, Vittorio | IV 20640 - IV 20641 	  | 
| Clementis, Vladimír | KU 4895 - KU 4896 	  | 
| Clemo, Jack R. | HN 2800 - HN 2805 	  | 
| Cleobulus, Lindius | FH 21128 - FH 21133 	  NH 5650  | 
| Cleomedes | FH 65048 - FH 65053 	  | 
| Cleomenes III., Lacedaemonia, Rex | NH 6775 	  | 
| Cleon, Curiensis | FH 30198 - FH 30203 	  | 
| Cleonides | FH 63048 - FH 63053 	  | 
| Cleostratus, Tenedius | FH 23248 - FH 23253 	  | 
| Clercq, Willem de | GU 53850 - GU 53851 	  | 
| Clerici, Gianni | IV 20680 - IV 20681 	  | 
| Cleveland, John | HK 1720 - HK 1721 	  | 
| Clidemus, Atheniensis | FH 34298 - FH 34303 	  | 
| Cliff, William | IH 28740 - IH 28741 	  | 
| Clinias, Tarentinus | FH 34048 - FH 34053 	  | 
| Clique | MS 3300 	  | 
| Clitarchus, Alexandrinus | FH 35348 - FH 35353 	  NH 6450  | 
| Clitarchus, Gnomologus | FH 50698 - FH 50703 	  | 
| Clitomachus, Carthaginiensis | FH 48248 - FH 48253 	  | 
| Clitopho | FH 28659 	  | 
| Clitophon, Rhodius | FH 50298 - FH 50303 	  | 
| Clive, Robert | NN 7500 	  | 
| Clodia | NH 7260 	  | 
| Clodius Albinus, Römisches Reich, Kaiser, Gegenkaiser | NH 7625 	  | 
| Clodius Pulcher, Publius | NH 7260 	  | 
| Cloete, Stuart | HN 2810 - HN 2815 	  | 
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