a study of interrelationships Enger, Eldon D. creator Smith, Bradley Fraser. text Boston McGraw-Hill Higher Education c2004 9th ed. / monographic 1 v. (various pagings) : col. ill. ; 29 cm. Environmental sciences 363 HIL 2004 A079 Or. 0072440007 (acidfree paper) http://www.loc.gov/catdir/toc/fy037/2002075341.html http://www.loc.gov/catdir/enhancements/fy0643/2002075341-d.html http://www.loc.gov/catdir/toc/fy037/2002075341.html http://www.loc.gov/catdir/enhancements/fy0643/2002075341-d.html