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What the United States can leam
Graham, Edward H., (1961)
What the United States can learn
Goddard, Maurice K., (1961)
The nature of the U.S. problem
Wirth, Conrad L., (1961)
Environmental namagement and the department of the interior
Cain, Stanley A., (1972)
Can ecology provide the basis for synthesis among the social sciences?
Cain, Stanley A., (1967)