Published in Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin, in 1922, in volume 1921, pages 77-81

Created: 2014-10-26, modified: 2014-10-26

Published in Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin, in 1922, in volume 1921, pages 86-91

Created: 2015-02-08, modified: 2015-02-08