Front Matter
p. 0
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The Biology of Apple Aphids
Lathrop, Frank H. pp. 177-204
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Additions to the Catalog of Ohio Vascular Plants for 1927
Schaffner, John H. pp. 205-214
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Mallophaga from Ohio Birds
Peters, Harold S. pp. 215-228
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The Colorimetric Determination of Total Phosphorous in Plant Solutions
Gerdel, R. W. p. 229
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Back Matter
p. 999
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