Författare: A.E. Hall

Stöd

1 E-böcker av A.E. Hall

G.H. Cannell & A.E. Hall: Agriculture in Semi-Arid Environments
The semi-arid zones of the world are fragile ecosystems which are being sub- stantially modified by the activities of mankind. Increasing human populations have resulted in greater demands on semi-ar …
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€114.94