Inventors and discoverers
Inventors and discoverers: changing our world /
prepared by National Geographic Book Service
. - 1st ed.
. - Washington : National Geographic Society, 1988
. - 320 p. ill. 28 cm.
0-87044-751-3 0-87044-752-1 0-87044-753-X
0-87044-751-3 0-87044-752-1 0-87044-753-X