Museum pictorial
Denver Museum of Natural History
Kate P. Kent ; illustrations by Arminta Neal
Denver Museum of Natural History c1971 Museum pictorial no. 21
Available at 2 libraries
by Alfred M. Bailey ; with photographs by the author and Jack A. Murphy
Denver Museum of Natural History 1961 Museum pictorial no.15
Available at 1 libraries
by Alfred M. Bailey
Denver Museum of Natural History 1956 Museum pictorial no.12
Denver Museum of Natural History 1955 Museum pictorial no.11
by H.M. Wormington ; photographs by A. Neal
Denver Museum of Natural History 1951 Museum pictorial no. 2