Winfield, Armand G. frey50
The inventor's handbook. - Englewood Cliffs, New Jersey Prentice Hall 1990 - xxii, 279 p.
9780135034187
Inventions Handbooks --Manuals--Patents Handbook
608.773 Win 12
The inventor's handbook. - Englewood Cliffs, New Jersey Prentice Hall 1990 - xxii, 279 p.
9780135034187
Inventions Handbooks --Manuals--Patents Handbook
608.773 Win 12