Worf, Douglas L. text Lexington, Mass Lexington Books c1980 monographic xii, 227 p. : ill. ; 24 cm. edited by Douglas L. Worf. Includes bibliographical references and index. Indicators (Biology) Environmental monitoring Environmental pollution Analysis Congresses Monitoring, Physiologic Congresses QH541.15.I5 B5 628.5/028 WA670 B615 1978 0669033065 79002977 UOEL 000 20150409122813.0 000