Ost-tscheremissisches Wörterbuch

Helsinki: Suomailais-Ugrilainen Seura, 1948. — 210 с.
In the spring of 1900, the Finnish scholar Heikki Paasonen spent four months collecting texts among the Eastern Mari. His base was Churajeva, a town about 25 kilometres north of the regional centre of Birsk in what is now Bashkiria. Paasonen's texts were ultimately edited by Paavo Siro and published in 1939. For anyone interested in the Mari language, that is one of the essential text collections. Alongside the texts, Paasonen also compiled a dictionary of all the vocabulary therein as well as other words he heard in Bashkiria. Siro set to work on that as well, but delayed by World War II, the dictionary was finally published a decade after the texts, in 1948.