International invention guide /
Feldman, Clarence
International invention guide / Clarence Feldman. - Switzerland : International Federation of Inventor's Associations, c1994. - 112 p. : 21 cm.
2940103011
Inventions--guide.
T 49.5 / .F312 1994
HS 608 / F333 1994
International invention guide / Clarence Feldman. - Switzerland : International Federation of Inventor's Associations, c1994. - 112 p. : 21 cm.
2940103011
Inventions--guide.
T 49.5 / .F312 1994
HS 608 / F333 1994