@book{bhlpg27415736, title = {Calwers Käferbuch; einfürhrung in die kenntnis der käfer Europas }, volume = {Bd.2 (1916)}, url = {https://www.biodiversitylibrary.org/page/27415736}, publisher = {E. Schweizerbart, [etc.]}, author = {Calwer, C. G. (Carl Gustav), 1821 -1874}, year = {1916}, pages = {Page 830}, } @book{bhlpg39054379, title = {The Fern gazette }, volume = {v.14 (1991-1992)}, url = {https://www.biodiversitylibrary.org/page/39054379}, publisher = {British Pteridological Society}, author = {British Pteridological Society. }, year = {1991}, pages = {Page 91}, }