By Smith, P. G., Morrow, Richard H.
By Ridgeway, G.L, Wren, M, Stokes, D.E
By Johnson, Gordon J., Weale, Robert, Minassian, Darwin C.
By Woodrow, Philip
By Abbatt, Fred, McMahon, Rosemary
By Scriven, Angela, Orme, Judy
By Mitchell, David R., Brown, Roy Irwin
By Moullin, .
By Katz, Jeanne, Peberdy, Alyson, Sidell, Moyra
By Katz, Jeanne, Peberdy, Alyson, Douglas, Jenny
By Sidell, Moyra, Douglas, Jenny
By Open University
By NHSU
By Warren, Kenneth S., Mahmoud, Adel A. F.
By Hendrickse
By Unidentified Author
By Mackie, T.J., McCartney, J.E., Cruickshank, Robert, etc.
By World Health Organization(WHO)
By D. C. Shanson
By royal college of pathologists
By K. K. Kafle, R. G. Pinniger
By Reynolds, Jill
By Cathy Lloyd, Stephen Handsley, Jenny Douglas, Sarah Earle, Sue Spurr
By Sarah Earle, Cathy Lloyd, Moyra Sidell, Sue Spurr
By Reynolds, Jill, Seden, Janet
By Battey, Bonnie Weaver Ph. D. R. N.
By Davis, Dale