Columbia subject headings:
Human ecology.
Marxian economics.
Population.
Production (Economic theory)
Sociology.
Technology--Social aspects.
Harvard subject headings:
Human ecology.
Marxian economics.
Population.
Production (Economic theory)
Sociology.
Technology--Social aspects
Princeton subject headings:
Human ecology.
Marxian economics.
Population.
Production (Economic theory)
Sociology.
Technology--Social aspects.