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Johnson, Philip C.

b. 1907 – d. 1990 · 2 books

Books by Johnson, Philip C.

Outbreaks of the western spruce budworm in the American northern Rocky Mountain area from 1922 through 1971
Outbreaks of the western spruce budworm in the American northern Rocky Mountain area from 1922 through 1971
1975
Bark beetle risk in mature ponderosa pine forests in western Montana
Bark beetle risk in mature ponderosa pine forests in western Montana
1972