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O. A. Johannsen

Personal Information

Born January 1, 1870
Died January 1, 1961 (91 years old)
Davenport, United States
Wikipedia
16 books
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Books

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Spruce bud worm and spruce leaf miners

O. A. Johannsen
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Aquatic nematocerous diptera. (I)

O. A. Johannsen
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The fungus gnats of North America, part I

O. A. Johannsen
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Insect notes for 1910

O. A. Johannsen
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The fungus gnats of North America, part II

O. A. Johannsen
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Insect notes for 1911

O. A. Johannsen
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Guide to the insects of Connecticut, part vi

O. A. Johannsen
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Gives basic information about the life of a parrot, written in the form of a riddle.

The fungus gnats of North America, part III

O. A. Johannsen
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Guide to the insects of Connecticut

O. A. Johannsen, Wilton Everett Britton
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Potato flea-beetle (Epitrix cucumeris)

O. A. Johannsen
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Insect notes for 1909

O. A. Johannsen
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Insect notes for 1912

O. A. Johannsen
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Genera of plancton organisms of the Cayuga lake basin

O. A. Johannsen
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The fungus gnats of North America, part IV

O. A. Johannsen
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Embryology of insects and myriapods

O. A. Johannsen
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Aquatic diptera

O. A. Johannsen
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