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An evaluation of the impact of the Saratoga spittlebug, A̲p̲h̲r̲o̲p̲h̲o̲r̲a̲ s̲a̲r̲a̲t̲o̲g̲e̲n̲s̲i̲s̲ (Fitch), on the growth of red pine, P̲i̲n̲u̲s̲ r̲e̲s̲i̲n̲o̲s̲a̲ Ait
Heyd, Robert Lewis

Text (1978)
Part of Electronic Theses & Dissertations
Life-history of the hemlock measuring worm, Ellopia fiscelleria
Dibble, C. B. (Charles Bradford)

Text (1927)
Part of Electronic Theses & Dissertations
An ecological survey of insects of a Pennsylvania farmstead
Angle, Robert H.

Text (1956)
Part of Electronic Theses & Dissertations