Inventors and discoverers : changing our worlsd
Inventors and discoverers : changing our worlsd -- Wasington, D.C. National Geographic Book Service 1988
320 p.: ill. ; 28 cm.
Includes index.
0-87044-752-1
Inventions-History.
GR 609 I622 1988
320 p.: ill. ; 28 cm.
Includes index.
0-87044-752-1
Inventions-History.
GR 609 I622 1988