- Åbo Akademi University Library: Manuscript collections, Westermarck, Edvard, vol XXXII
- Wikman, K. R. V. (1940). Letters From Edward B. Tylor and Alfred Russel Wallace to Edward Westermarck; edited with introductory remarks concerning the publication of The History of Human Marriage. Academiae Aboensis Humaniora: 13(7): (1)-22 [p. 14]
No summary available.