George Milton Hopkins

Aug 12, 2015

Experimental Science

Oct 12, 2012

Experimental Science; Elementary, Practical and Experimental Physics Volume 2

May 20, 2012

Experimental Science; Elementary, Practical and Experimental Physics

May 1, 2012

Experimental Science Volume 1; Elementary, Practical and Experimental Physics

Apr 16, 2012

Inventor's Manual, How to Work a Patent to Make It Pay

Mar 1, 2012

Inventor's Manual, How to Work a Patent to Make It Pay; A Guide to Inventors, in Perfecting Their Inventions, Taking Out Their Patents, and Disposing of Them

Mar 9, 2010

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