Wakeley J.
Superv Nurse. 1977 Jul;8(7):80.
PMID: 586853

Lansdown G.
Health Visit. 1979 Feb;52(2):30.
PMID: 253694

Simmonds EH.
Health Visit. 1978 Dec;51(12):466-8.
PMID: 255489

[No authors listed]
Nurs Times. 1967 Dec 29;63(52):1737.
PMID: 6074100

[No authors listed]
Br Med J. 1968 May 11;2(5601):319-20.
PMID: 5648970 Free PMC Article
Free PMC Article

Watson EA.
J Volunt Adm. 1993 Fall-1994 Winter;12(1):58-60.
PMID: 10133490

Katz M, Proudfoot B.
Volunt Adm. 1980-1981 Winter;13(4):15-9.
PMID: 10250441