Columbia subject headings:
Mortality--Congresses.
Mortality--Information services--Congresses.
Mortality--Statistics--Databases--Congresses.
Registers of births, etc.--Databases--Congresses.
Harvard subject headings:
Mortality--Statistical methods--Congresses.
Mortality--Statistics--Databases--Congresses.
Registers of births, etc.--Congresses.
Registers of births, etc.--Databases--Congresses.
Princeton subject headings:
Mortality--Statistical methods--Congresses.
Registers of births, etc.--Congresses.