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The Grasshopper problem and Alfalfa culture. 
LU. S. Dept. of Agric., Circular No. 84, 1907. | 
The Spring Grain-Aphis or so-called Green Bug. 
[U.S. Dept. of Agric., Circular No. 95, 1907. ] 
U.S. Dept. Agric. 
WEIsE (J.). [See HeypEn (L. V.).] 
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U.S. Dept. Agric. 
Wiciiamson (E. B.). The Dragonflies (Odonata) of Burma and Lower 
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[Proc. U. S. Nat. Mus., 1907.] The Smithsonian Institution. 
