O'Connor JT.
J Am Dent Assoc. 1977 Jun;94(6):1056-7. doi: 10.14219/jada.archive.1977.0371.
PMID: 266514

Dreier DL.
J Am Dent Assoc. 1976 Jun;92(6):1230-2. doi: 10.14219/jada.archive.1976.0178.
PMID: 1064650

[No authors listed]
J Am Dent Assoc. 1973 Jan;86(1):179-216. doi: 10.14219/jada.archive.1973.0039.
PMID: 4508879

[No authors listed]
Fed Regist. 1986 Apr 17;51(74):13099.
PMID: 10276072

[No authors listed]
J Am Dent Assoc. 1971 Jan;82(1):179-204.
PMID: 5274167

[No authors listed]
J Am Dent Assoc. 1982 Dec;105(6):1053-75. doi: 10.14219/jada.archive.1982.0373.
PMID: 6961148

Helmholdt RD.
J Am Dent Assoc. 1976 Sep;93(3):519. doi: 10.14219/jada.archive.1976.0230.
PMID: 1066383