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A Graphic Summary of the Value of Farm Property
The outlook is for further improvement in the economic position of American agriculture in 1937.
Hymenoptera
The Hymenoptera is one of the largest orders of terrestrial anthropods and compromises the sawflies, wasps, ants, bees and parasitic wasps. This book examines the current state of all major areas of research for this important group of insects, including systematics, biological control, behaviour and use in education.
Agriculture Handbook
Set includes revised editions of some issues.
