TY  - SER
AU  -  Bruce, H. Addington 
TI  -  The Mentor : :  Great American Inventors, Vol. 1, Num. 29, Serial No. 29 
PY  - 2015///
PB  -  Project Gutenberg, 
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/49893
ER  -