اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Clark, Samuel Evans
LoC No.: 07033939
Title: Learn to Invent, First Steps for Beginners Young and Old
Practical Instuction, Valuable Suggestions to Learn to Invent
Language: English
LoC Class: T: Technology
Subject: Inventions
Release Date: Mar 15, 2014
Copyright Status: Public domain in the USA.
: Project Gutenberg books are always free!