Kruse LC, Hahn CW, Barry J, Gay JE.
J Nurs Educ. 1978 Oct;17(8):27-35.
PMID: 81197

Smith TA.
J Dent Educ. 1971 Oct;35(10):641.
PMID: 4107341

Leatt CJ.
Nurs Times. 1981 Jun 17-23;77(25):1084-5.
PMID: 6165971

Bennett P.
Imprint. 1980 Feb;27(1):22, 70.
PMID: 6153636

Choomsai Na Ayudhaya V.
J Med Assoc Thai. 1972 Feb;55(2):107-9.
PMID: 4111435

McKenzie FL.
Nurs Times. 1969 Mar 13;65(11):336-7.
PMID: 4179619

Willard C.
NLN Publ. 1977;(16):129-33.
PMID: 74824