Riga match and correspondence games /
[Hartwig Cassel and Hermann Helms, editors]
APA Citation
Helms, H., Cassel, H. (1916). Riga match and correspondence games. [New York: s.n..
MLA Citation
Helms, Hermann, and Hartwig Cassel. Riga Match And Correspondence Games. [New York: s.n., 1916.
Warning: These citations may not always be complete (especially for serials).