Spaceship earth.
Jackson, Barbara Ward
Spaceship earth. - New York Columbia University Press 1966. - viii, 152 p. - The George B. Pegram lectures, no.6 .
International relations
International cooperation
Spaceship earth. - New York Columbia University Press 1966. - viii, 152 p. - The George B. Pegram lectures, no.6 .
International relations
International cooperation