TY  - BOOK
AU  - Usher,Abbott Payson
TI  - A history of mechanical inventions
SN  - 048625593X
U1  - 608.7 
PY  - 1988///, c1954
CY  - New York, NY.
PB  - Dover
KW  - Inventos
KW  - Historia
KW  - Tecnología
ER  -