NLM files, 5/11/93 (hdg.: Stopes, Marie Carmichael, 1880-1958; usage: Marie C. Stopes; Marie Carmichael Stopes)
Marie Stopes and the sexual revolution, 1993 p. 269 ("Fay, Erica (pseudonym of MS)") p. 270 ("Mortlake, G.N. (pseudonym of MS)")
Fossil plants, 2004 t.p. (Marie C. Stopes)
Marie stopes Intrernational www site, 19 Dec. 2006 Biography page (Went to university, studied in Germany and gained a doctorate and went down coalmines to study fossilised plants, also wrote poetry)