TY  - BOOK
ED  - International congress of hygiene and demography
TI  - Official program, XV International congress on hygiene and demography,: Washington, D. C., September 23-28, 1912
AV  - RA422 .I6 1912h
PY  - 1912///]
CY  - [Washington?
N1  - English, French and German
ER  -