TY  - GEN
AU  - Keyfitz,N
TI  - Thirty years of demography and Demography
SN  - 0070-3370
PY  - 1994///0127
KW  - Demography
KW  - History, 20th Century
KW  - Humans
KW  - Periodicals as Topic
KW  - history
KW  - Research
KW  - United States
N1  - Publication Type: Historical Article; Journal Article
ER  -