Books by John N. Mugaas:
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Mugaas, John N.: Annual Variation of Daily Energy Expenditure by the Black-Billed Magpie: A Study of Thermal and Behavioral Energetics (1981), also by James R. King (PDF at unm.edu)
Additional books by John N. Mugaas in the extended shelves:
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Mugaas, John N.: Metabolic Adaptation to Climate and Distribution of the Raccoon Procyon Lotor and Other Procyonidae, also by Kathleen P. Mahlke-Johnson and John Seidensticker (Gutenberg ebook)
Find more by John N. Mugaas at your library, or elsewhere.