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Ecology Published by: John Wiley & Sons, Inc. (United States of America) Subject: Environmental Studies Biology Language: English Published: 1920 ISSN: 0012-9658, 1939-9170 Available at 44 Universities. | |||
National geographic Published by: National Geographic Society (United States of America) Subject: Geography Children And Youth Environmental Studies Language: English Published: 1888 ISSN: 0027-9358 Available at 118 Universities. |