National Science Library of Georgia

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Международная классификация изобретений : Библиогр. указ. / Сост. Г.П. Челкак, Е. М. Лебединская ; Всесоюзная патентно-техническая библиотека.

Contributor(s): Material type: TextTextLanguage: Russian Москва: ВНИИПИ, 1987Edition: Изд. 2-е дополненноеDescription: 43,[2] сSubject(s):
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