TY - GEN AU - Ray, Bill T. TI - Environmental engineering T2 - PWS series in engineering SN - 0534206522 (acid-free paper) AV - TD146 .R38 1995 PY - 1995/// CY - New York PB - PWS Pub. Co. KW - Environmental sciences KW - Environmental engineering N1 - Includes bibliographical references and index ER -