00528pamaa2200193 4500 0000012901 20091217090000.0 003018679X 508 RAV 1998 GE70 RAV 1998 Raven Environment Peter H. Raven, Linda R. Berg and George B. Johnson. 2nd ed. Fort Worth: Saunders College, 1998. xxii, 661p.: col.ill.; 29cm. Environment Nature Berg, Linda R. Johnson, George B.