http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Contributions to the ecology and biology of the Danish fresh-water leeches (Hirudinea)
109 pages : illustrations, maps. ; 26 cm.
[Tr. by M. Rehder] Kbenhavn, E. Munksgaard, 1943.