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Torolf R. Torgersen

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Save our birds, save our forests

by Torolf R. Torgersen First published in 1995
3 editions, 1 ebook
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Douglas-fir tussock moth handbook: predation and parasitization of Douglas-fir tussock moth egg masses

by Torolf R. Torgersen First published in 1979
3 editions

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Parasite records for the Douglas-fir tussock moth

by Torolf R. Torgersen First published in 1981
2 editions

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The occurrence of the hemlock looper (Lambdina fiscellaria (Guenee)) (Lepidoptera: Geometridae) in southeast Alaska, with notes on its biology

by Torolf R. Torgersen 1 edition, 1 ebook
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Identification of parasites of the Douglas-fir tussock moth, based on adults, cocoons, and puparia

by Torolf R. Torgersen First published in 1977
1 edition, 1 ebook
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The occurrence of the hemlock looper (Lambdina fiscellaria (Guenée)) (Lepidoptera: Geometriadae) in southeast Alaska, with notes on its biology

by Torolf R. Torgersen First published in 1967
1 edition

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OLID: OL4928129A

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