Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1981)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1983)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1989)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1991)