By JOY GAMMON
By Robert H. Bishop
By Jackson, Robert
By Howard S. Gitlow, David M. Levine
By Richard Lacey
By Benjamin S. Blanchard, Wolter J. Fabrycky
By Seiichi Nakajima, Kentaro Nakamura
By Richard F. Gunst, Robert L. Mason
By Mason, Leonard Charlish
By Marshall, Elizabeth
By A C Davies
By Hamdy A. Taha
By Compton, Richard G.
By Fisher, A. C.
By Frederick Joseph Melhuish Smith
By Percival Marshall
By Herbert Lieberman, Martin Rieger, Gilbert S. Banker
By K. Leake, N.J. Henthorne
By Bourbousson, P.H.M., Leake, K.
By R. Baird, Sally F. Bloomfield (London School of Hygiene, Cheshire, UK)