Vegetational change along altitudinal gradients : studies in Ethiopia show that discreteness of zonation varies with steppness of slope. - Washington, D.C.

1. Verfasser: Beals, Edward W.
Ort/Verlag/Jahr: 1969.
Schlagworte:
Enthalten in: Science ; 165.1969, no. 3897, S. 981-985 : zahlr. Ill.
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