Influences of geographic environment on the basis of ratzel s system of anthropo-geography /

by Semple, Ellen Churchill
Published 1968

American history and its geographic conditions /

by Semple, Ellen Churchill 1863-1932, Semple, Ellen Churchill 1863-1932
Published 1960

American history and its geographic conditions /

by Semple, Ellen Churchill 1863-1932
Published 1903