For draft versions see Margaret Sanger Papers Micrfoilm Edition, Smith College Collections, S71:404.
For copies of drafts of data on Japan and Italy which Sanger used that were probably redated, see
Margaret Sanger Papers…
Notes on speech to the Bryn Mawr College Liberal Club. A final version was not
found. Portions of these notes were also used in Sanger's "The
Necessity of Birth Control,"" Dec. 19, 1928.
For other articles in the Britannica Book of the
Year series, "Birth Control," 1946-1958, see Margaret Sanger Papers Microfilm Edition:
Collected Documents Series: 1944; 1946; 1947;
…