"August 1993"--V.I. "1993"--V.II, EPA website. "EPA-821-R-93-010A"--V.I. "EPA-821-R-93-010B"--V.II. "Revision 1"--V.I. "This document was prepared under EPA contract no. 68-C9-009 by the Environmental Services Division of DynCorp Viar, Inc."--V.I & II, acknowledgments. "The methods in this volume were previously published in EPA 821 RR-92-002. This volume is a revision of that publication and supersedes it"--V.I, page i.
Bibliography Note
Includes bibliographical references.
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