V. Hufnagel
发表
R. Pokras,
V. G. Hufnagel,
V. Hufnagel,
1988,
American journal of public health.
R. Pokras,
V. G. Hufnagel,
V. Hufnagel,
1987,
Vital and health statistics. Series 13, Data from the National Health Survey.
V. G. Hufnagel,
V. Hufnagel,
1988
.