Chironomids and other invertebrates from north Boulder Creek, Colorado
Distribution of invertebrates in a high mountain brook in the Colorado Rocky Mountains
A study of the ecological distribution of ants in Gregory Canyon, Boulder, Colorado
Data on mountain environments: III. Front Range, Colorado, four climax regions, 1959-1964
Data on mountain environments: II. Front Range, Colorado, four climax regions, 1953-1958
Data on mountain environments: I. Front Range, Colorado, sixteen sites, 1952-1953
A cytological investigation of the mosses of the Rocky Mountains
The influence of light intensity on growth and chlorophyll in arctic, subarctic, and alpine populations of Deschampsia caespitosa and Trisetum spicatum
Cytotaxonomy of the alpine vascular plants of Mount Washington
Additions to the flora of Colorado - IV