J. W. Helmick
发表
J. M. Palmer,
T. Watamori,
J. W. Helmick,
1976,
The Journal of speech and hearing disorders.
R. M. Mason,
J. G. Gattozzi,
J. W. Unger,
1977,
Journal of the American Dental Association.
J. W. Helmick,
M. Wipplinger,
1975,
Journal of communication disorders.