Environmental Science:a study of Interrelationships

 Enger, Eldon D.; Smith, Bradley F.; Bockarie, Anne Todd.;

Boston : : McGraw-Hill , 2006

Integrated science

 Tillery, Bill W.; Enger, Eldon D.; Ross, Frederick C.;

Boston : : McGraw-Hill Higher Education , 2007

Concepts in biology fourteenth edition

 Enger, Eldon D.; Ross, Frederick C.; Bailey, David B.;

New York : McGraw-Hill , 2012

Integrated science

 Tillery, Bill W.; Enger, Eldon D.; Ross, Frederick C.;

New York : McGraw-Hill , 2013