TY - BOOK AU - Spencer Edgar Winston TI - Earth science: understanding environmental systems SN - 0072341467 (pbk. : acidfree paper) AV - QE28 .S7 2003 U1 - 550 21 PY - 2003/// CY - Boston PB - McGraw-Hill KW - Earth sciences N1 - Includes index UR - http://www.loc.gov/catdir/description/mh024/2002025073.html UR - http://www.loc.gov/catdir/toc/mh023/2002025073.html ER -