Embryology of Insects and Myriapods, By O. A. Johannsen and F. H. Butt. McGraw-Hill Book Co., New York. Pages I–XI and 1–462, 370 figures. 1941. Price 7.00. - How to Make an Insect Collection, Ward's Natural Science Establishment, Inc., Rochester, N. Y., 32 pages, 38 figures. 1940. Price. 15.

R. H. Ozburn

doi:10.4039/Ent73175-9

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Embryology of Insects and Myriapods, By O. A. Johannsen and F. H. Butt. McGraw-Hill Book Co., New York. Pages I–XI and 1–462, 370 figures. 1941. Price $5.00. - Entomophagous Insects, Curtis P. Clausen. McGraw-Hill Book Co., New York. Pages I–X and 1–688, 257 figures. 1940. Price $7.00. - How to Make an Insect Collection, Ward's Natural Science Establishment, Inc., Rochester, N. Y., 32 pages, 38 figures. 1940. Price. 15.

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Embryology of Insects and Myriapods, By O. A. Johannsen and F. H. Butt. McGraw-Hill Book Co., New York. Pages I–XI and 1–462, 370 figures. 1941. Price $5.00. - Entomophagous Insects, Curtis P. Clausen. McGraw-Hill Book Co., New York. Pages I–X and 1–688, 257 figures. 1940. Price $7.00. - How to Make an Insect Collection, Ward's Natural Science Establishment, Inc., Rochester, N. Y., 32 pages, 38 figures. 1940. Price. 15.

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

Embryology of Insects and Myriapods, By O. A. Johannsen and F. H. Butt. McGraw-Hill Book Co., New York. Pages I–XI and 1–462, 370 figures. 1941. Price $5.00. - Entomophagous Insects, Curtis P. Clausen. McGraw-Hill Book Co., New York. Pages I–X and 1–688, 257 figures. 1940. Price $7.00. - How to Make an Insect Collection, Ward's Natural Science Establishment, Inc., Rochester, N. Y., 32 pages, 38 figures. 1940. Price. 15.

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