1. “Introduced Parasites and Predators of Arthropod Pests and Weeds: A World Review,”,1978
2. Origin of ice ages: Pollen evidence from arctic Alaska;Colinvaux;Science,1964
3. Bering land bridge: Evidence of spruce in late-Wisconsin times;Colinvaux;Science,1967
4. “Biogeography, An Ecological and Evolutionary Approach,”;Cox,1980
5. “The World Was My Garden: Travels of a Plant Explorer.”;Fairchild,1945