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1977.
1982.
1975.
1971.
“Explanatory supplement to ecoregions map of the continents.”
16: 307-10 (with included map).
1989.
“Descriptions of the Ecoregions of the United States, 2nd edn.”
(1391, (with included map)): .
1995.
.
1983.
1993.
1981.
1981.
1982.
1982.
“Travel cost and the ideal free distribution”
69: 516-19.
1994.
“Body weights of the Santa Cruz Island Scrub Jay”
4 (No. 4): 148-153.
1979.
1980.
1980.
1990.
1993.
1984.