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Review of information regarding the conservation of living resources of the Antartic marine ecosystem / Final report to U.S. Marine Mammal Commission in fulfillment of Contract MM8AD055 John L. Bengtson. - Washington, D.C. : U.S. Marine Mammal Commission, 1978. - xi, 148 p. - Report, MMC-78-04 Report (United States. Marine Mammal Commission), MMC-78-04. .