by Solon, Jerry A., Kilpatrick, Nancy S., Walkington, Robert A., Todd, Joel Ann
Published in Public health reports (1974) (01.05.1985)

by Walkington, R A
Published in Bulletin of the Medical Library Association (01.01.1969)

by ECKLUND, RICHARD C, HAYASE, MASASHI, WALKINGTON, ROBERT J
Year of Publication 27.05.1996