by Hrehorovich, Victor, Dyal, William W., Jr, William D. Schrack
Published in Health services reports (01.11.1972)

by Dyal, William W.
Published in American journal of preventive medicine (01.11.1995)

by Roper, William L., Edward L. Baker, Jr, William W. Dyal, Ray M. Nicola
Published in Public health reports (1974) (01.11.1992)

by Turnock, Bernard J., Handler, Arden, William W. Dyal, Gregory Christenson, Edward H. Vaughn, Rowitz, Louis, Judith W. Munson, Thomas Balderson, Richards, Thomas B.
Published in Public health reports (1974) (01.07.1994)