Published in Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin, in 1881, in volume 1881, pages 17-19

Created: 2010-02-09, modified: 2011-06-21

Published in Sitzungsberichte der Gesellschaft naturforschender Freunde zu Berlin, in 1881, in volume 1881, pages 49-52

Created: 2011-06-03, modified: 2011-06-21

Published in Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin, in 1881, in volume 1881, pages 69-72

Created: 2013-08-21, modified: 2013-08-21

Published in Sitzungsber. Ges. naturf. Freunde Berlin, in 1881, in volume 1881, pages 107-109

Created: 2011-06-03, modified: 2011-06-21

Published in Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin, in 1881, in volume 1881, pages 131-133

Created: 2013-08-21, modified: 2013-08-21

Published in Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin, in 1881, in volume 1881, pages 162-163

Created: 2010-06-27, modified: 2011-06-21

Published in Sitzungsber. Ges. naturf. Freunde Berlin, in 1881, in volume 1881, issue 5, pages 81-85

Created: 2010-03-21, modified: 2011-06-21

Published in Sitzungsberichte der Gesellschaft naturforschender Freunde zu Berlin, in 1881, in volume 1881, issue 6, pages 87-91

Created: 2010-03-21, modified: 2011-06-21

Published in Sitzungsber. Ges. naturf. Freunde Berlin, in 1881, in volume 1881, issue 9, pages 147-150

Created: 2010-03-21, modified: 2011-06-21