Published in Sitzungsberichte Gesellschaft Naturforschender Freunde Berlin, in 1910, in volume 1910, pages 436-441

Created: 2014-04-03, modified: 2014-04-03

Published in Sitzungsberichte Der Gesellschaft Naturforschender Freunde Zu Berlin, in 1910, in volume 1910, issue 2, pages 63-77

Created: 2017-10-12, modified: 2017-10-12