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

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1992)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1993)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1994)