Series in Biology

Data on mountain environments: III. Front Range, Colorado, four climax regions, 1959-1964

Data on mountain environments: I. Front Range, Colorado, sixteen sites, 1952-1953

Ecosystems of the east slope of the Front Range in Colorado

Further studies on the germination of seeds of Colorado alpine plants

Lichens of the Chiricahua Mountains, Arizona

Notes on a collection of herpetozoa from the Yucatan Peninsula of Mexico ; Reptiles -- Yucatán Peninsula

Studies on the germination of seeds of Colorado alpine plants

Cnemidophorus tigris punctatus: A new whiptailed lizard from northwestern Sonora, Mexico

Cnemidophorus alpinus: A new species of teiid lizard from Puebla, Mexico

Distribution of invertebrates in a high mountain brook in the Colorado Rocky Mountains