Contribution [I]-III to the coastal and plain flora of Yucatan, by Charles Frederick Millspaugh.

v.1:no.1(1895)

Contributions to the flora of Venezuela : from Ericaceae through Compositae / Julian A. Steyermark and collaborators.

v.28:no.3(1953)

Contributions to the flora of Venezuela / [Julian A. Steyermark and collaborators].

v.28:no.1(1951)

Contributions to the flora of South America: Studies on Andean Compositae, II. Studies in South American plants, III.

v.27:no.2(1951)

Contributions to the flora of Venezuela : from Droseraceae through Umbelliferae / Julian A. Steyermark and collaborators.

v.28:no.2(1952)

Contributions to the flora of Venezuela / Julian A. Steyermark and collaborators.

v.28:no.4(1957)

Comprehensive index to the Flora of Guatemala / Terua P. Williams.

v.24:pt.13(1977)

A list of the land and sea mammals of North America north of Mexico. Supplement to the synopsis. By D.G. Elliot.

v.2:no.2(1901)

Contribution to the ornithology of San Domingo, by George K. Cherrie ...

v.1:no.1(1896)

First supplement to the Orchids of Peru / Charles Schweinfurth.

v.33(1970)

A contribution to the ichthyology of Mexico.

v.3:no.6(1902)

Evolution of neotropical cricetine rodents (Muridae) with special reference to the phyllotine group.

v.46(1962)