The Art of Inventing
Prindle, Edwin J.
The Art of Inventing [electronic resource] / Edwin J. Prindle - Project Gutenberg, 2014 - Project Gutenberg 45541 .
Public domain in the USA.
Electronic text
The Art of Inventing [electronic resource] / Edwin J. Prindle - Project Gutenberg, 2014 - Project Gutenberg 45541 .
Public domain in the USA.
Electronic text