Economic biology : a text for students of agriculture and general biology

Weldon, George Percival, 1880-

Economic biology : a text for students of agriculture and general biology - New York McGraw-Hill Book 1929 - xi, 457 p. il.; 22 cm. - McGraw-Hill Vocational Texts .

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BIOLOGIA
ANIMALES
ENFERMEDADES DE LAS PLANTAS
MALEZAS
INSECTA
AGRICULTURA
PLANTAS
CRECIMIENTO
BOTANICA ECONOMICA