Date of birth	1890
Date of death	1956
Occupation	professori
Other Forms of Name	Toivonen, Yrjö Henrik (1890-1956) Toivonen, Yrjö Heikki (1890-1956)
Identifiers	0000000109134150 (isni) http://urn.fi/URN:NBN:fi:au:finaf:000072265 (finaf)