Patterns on our Planet: Concepts and Themes in Geography. New York: Merrill, 1990. Huke, Robert E. aquot;The Green Revolution.aquot; Geography 92/93, 7th Edition. Gerald Pitzl (Ed.). Guilford, CT: Duskin Publishing Group, 1992: 29-35. Knox, Paulanbsp;...
|Title||:||Human geography, an introduction|
|Author||:||Laura Geller, Pennsylvania State University. Dept. of Independent Learning, Pennsylvania State University. Dept. of Geography|