[No authors listed]
J Am Dent Assoc. 1979 Jun;98(6):963-98. doi: 10.14219/jada.archive.1979.0208.
PMID: 287716

Graham JW.
J Am Dent Assoc. 1977 Jun;94(6):1202-5.
PMID: 266535

Gardner AF.
J Calif Dent Assoc. 1977 Jun;5(6):8-9.
PMID: 267067

Chambers DW, Hamilton DL.
J Dent Educ. 1976 Apr;40(4):222-6.
PMID: 1063163

Weaver RG.
J Am Coll Dent. 1999;66(4):31-5.
PMID: 10665239

Wolf MC, Kaslick RS, Berman CL.
J Am Coll Dent. 1976 Apr;43(2):127-32.
PMID: 1063786

Massler M.
J Dent Educ. 1970 Jun;34(2):145-50.
PMID: 4911695