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Source:
Professional Geographer. Nov89, Vol. 41 Issue 4, p450-464. 15p.
تفاصيل العنوان
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Source:
Annals of the Association of American Geographers. Mar1989, Vol. 79 Issue 1, p65-78. 14p.
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Source:
BioScience. Jan1989, Vol. 39 Issue 1, p24-30. 7p. 1 Illustration, 2 Diagrams, 1 Chart, 8 Graphs.
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Source:
Journal of Environmental Education. Winter1989/1990, Vol. 21 Issue 2, p9. 0p.
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Source:
Professional Geographer. May89, Vol. 41 Issue 2, p247-248. 2p.
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Source:
BioScience. Nov89, Vol. 39 Issue 10, p740-741. 2p. 1 Black and White Photograph, 1 Illustration.
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Source:
BioScience. Mar1989, Vol. 39 Issue 3, p192-193. 2p. 1 Black and White Photograph.
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Source:
BioScience. Mar1989, Vol. 39 Issue 3, p142-146. 5p. 2 Black and White Photographs, 1 Diagram.
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Source:
BioScience. Nov89, Vol. 39 Issue 10, p700-706. 7p. 1 Graph, 2 Maps.
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Source:
Annual Review of Ecology & Systematics. 1989, Vol. 20, p171-197. 27p.
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