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