Requested reference
Palmgren, P. (1972). Studies on the spider populations of the surroundings of the Tvärminne Zoological Station, Finland. Commentationes Biologicae 52: 1-133. 
-- Show included taxa
Palmgren, P. (1972). Studies on the spider populations of the surroundings of the Tvärminne Zoological Station, Finland. Commentationes Biologicae 52: 1-133. -- Show included taxa