| Zur Systematik | UB Regensburg |
| 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 |
| Citizen Science | NB 7120 |
| 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 |
| Claude.AI | ST 306 |
| Claudel, Camille | LI 22660 |
| Claudel, Paul | IH 28360 - IH 28361 |
| Claudianus, Claudius | FX 334998 - FX 335305 FX 334998 - FX 335002 NH 3660 - NH 3663 |
| Claudianus, Epigrammaticus | FH 73848 - FH 73853 |
| Claudianus, Mamertus | NH 7670 FX 276098 - FX 276105 |
| Claudius I., Römisches Reich, Kaiser | NH 7350 |
| Claudius II., Römisches Reich, Kaiser | NH 7650 |
| Claudius, Eduard | GN 3790 - GN 3791 |
| Claudius, Friedrich Matthias | GK 3255 - GK 3258 |
| Claudius, Hermann | GM 2845 - GM 2848 |
| 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 III., Antipapa, Papa | NV 2578 |
| Clemens non Papa, Jacobus | LP 22910 LU 22910 |
| Clemens VII., Antipapa, Papa | NV 2636 |
| Clemens VIII., Antipapa, Papa | NV 2644 |
| Clemens, Alexandrinus | NH 2470 - NH 2473 FH 67248 - FH 67253 CD 4950 - CD 4967 BO 2832 - BO 2833 DD 5720 - DD 5721 |
| Clemens, Scotus | FY 20218 - FY 20223 |
| 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 | NH 5650 FH 21128 - FH 21133 |
| 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 |
| Cloetta, Gian Gianett | IW 9641 - IW 9642 |
| Cloots, Jean-Baptiste | NO 3334 |
| Clostridium | XD 6000 - XD 6099 |
| Clot, René-Jean | IH 28800 - IH 28801 |
| © Universitätsbibliothek Regensburg, realisiert von Sepp Kuffer |