Subject
- Carrión, Daniel Alcides, 1857-18851
- Cárdenas, Lázaro, 1895-19701
- Chemical industry1
- Chemical structure1
- Chicle industry1
- China1
- Cinchona1
- Colombo Plan1
- Comoros1
- Congo (Brazzaville)1
- Consejo Nacional de Ciencia y Tecnología (Mexico)1
- Convention du mètre (1875)1
- Côte d'Ivoire1
- Crețulescu, Nicolae, Prince, 1812-19001
- Czechoslovakia1
- Davila, Carol, 1832?-18841
- Democritus, approximately 460 B.C.-approximately 370 B.C.1
- Denmark1
- Edelfelt, Albert, 1854-19051
- Egypt1