Vseukrainskai͡a set' nabli͡udatel'nykh punktov; instrukst͡sii po organizat͡sii nabli͡udeniı̆ i uchetov bolezneı̆ polevykh i ogorodnykh kul'tur
Khar'kov 1925
1925
U.S. Department of Agriculture, National Agricultural Library
U.S. Department of Agriculture, National Agricultural Library
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