Bergman, Edward F. Introduction to geography : people, places, and environment / Edward F. Bergman, William H. Renwick. - Upper Saddle River, N.J. : Prentice Hall, c1999. - xx, 553 p. : ill. (some col.), maps (some col.) ; 28 cm. ISBN: 013907452X LCCN: 98020383 LC Class. No.: G128 .B372 1999 / .B372 1999 Dewey Class. No.: 910