Goryachkin V. (kand. mat. nauk, inzh.-mekh.). Otval (K grafich. teorii pluga). Moskva: tip. K.A. Kaznacheeva. — 2, 49, 1, 50-53 s./Goryachkin V. (Candidate of Mathematical Sciences, Engineering and Mechanics). Moscow: type. K.A. Kazhnayeva. Volume 2, 49, 1, 50-53 p - landofmagazines.com

TransliterationGoryachkin V. (kand. mat. nauk, inzh.-mekh.). Otval (K grafich. teorii pluga). Moskva: tip. K.A. Kaznacheeva. — 2, 49, 1, 50-53 s.

In EnglishGoryachkin V. (Candidate of Mathematical Sciences, Engineering and Mechanics). Moscow: type. K.A. Kazhnayeva. Volume 2, 49, 1, 50-53 p

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