اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Prindle, Edwin J. (Edwin Jay), 1868-1942
Title: The Art of Inventing
Language: English
LoC Class: T: Technology
Subject: Inventions
Release Date: Apr 30, 2014
Copyright Status: Public domain in the USA.
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