Censuses for 1945-1967 called Series (or Segment) I; pre-1945, Series (or Segment) II; and post-1967, Series (or Segment) III,

The majority of Segments I and II are based on the "International population census bibliography, compiled by Doreen Goyer of the Population Research Center at the University of Texas, Austin. The majority of Segment III consists of post-1967 census data, and is primarily based on the "International population census Bibliography: revision and update, 1946-1977," also by Doreen Goyer.

Issues for <1993-> accompanied by reel guide with title: International population census publication. Segment III, unit 56 : contents listing.

Copies of reel guide at: HA 36.5 (reference copy); and at: D-25657 (circulating copy) Segment 3, unit 56.