TY  - BOOK
ED  - Time-Life Books.
TI  - The Natural world
SN  - 0809464918
U1  - 909 20
PY  - 1991///
CY  - Alexandria, Va.
PB  - Time-Life Books
KW  - Համաշխարհային պատմություն
KW  - Nature
KW  - Effect of human beings on
KW  - Human beings
KW  - Effect of environment on
N1  - Includes bibliographical references (p. 169-170) and index
ER  -