Semple ,Ellen C, Environmental Geography: Vol-11 : Influences on Man on Basis of Ratzel`s System / Textual Documents Ellen C.Semple . - Ist ed-2009. - New Delhi: Dominant Publishers And Distributors. - 678p: 22cm. ISBN: 81-7888-635-9 Subjects--Index Terms: Environmental Geography Pg-Geog Dewey Class. No.: 574.5