Changes in water quality resulting from impoundment, by William R. Duffer Curtis C. Harlin, Jr. for the Office of Research and Monitoring, Environmental Protection Agency.William R. Duffer1971
Induced hypolimnion aeration for water quality improvement of power releases, by Lowell E. Leach, William R. Duffer Curtis C. Harlin, Jr.Lowell E. Leach1970
Teaching Speech; Methods and Aims in the Study of Speech, by Pearl M. Heffron and William R. Duffey.Pearl M. Heffron1949
Abbreviated Titles of Biological Journals; a List Culled with Permission from the World List of Scientific Periodicals with Indications of the Abbreviations Recommended by the U.S.A. Standards Institute Where These Differ. Compiled by P.C. Williams on Behalf of the Biological CouncilBiological Council (England), Peter Claringbould Williams1969PDF4.1 MB