| #321 | Canadian plant disease survey. -- Ottawa : Agriculture Canada, 1960-2002. -- ISSN 0008-476X |
| #322 | Canadian veterinary journal. -- Ottawa : Canadian Veterinary Medical Association, 1960-. -- ISSN 0008-5286 |
| #323 | Canadian wood products. -- Don Mills : Forestry Network of Southam Business Communications, 1992-. -- ISSN 1183-9139 |
| #324 | Canadian wood products. -- West Hill, Ont. : Don Quick Pub.., 1974-1976. -- ISSN 0316-9677 |
| #325 | Canadian wood products industries. -- West Hill, Ont. : Don Quick Publ., 1962-1973. -- ISSN 0008-5375 |
| #326 | Canadian woodworker. -- Don Mills, Ont. : Southam-Maclean., 1942-1962. -- ISSN 0316-9669 |
| #327 | Candollea. -- Geneve : Conservatoire et Jardin botaniques, 1924-. -- ISSN 0373-2967 |
| #328 | Caries research. -- Basel : Karger, 1967-. -- ISSN 0008-6568 print. -- ISSN 1421-976X online |
| #329 | The Cattleman. -- Fort Worth : Texas and Southwestern Cattle Raisers Association, 1914-. -- ISSN 0008-8552 |
| #330 | Cérès. -- Rome : Organisation des Nations Unies pour l'alimentation et l'agriculture, 1968-1996. -- ISSN 0251-1568 |