@book{bhlitem9247, title = {Index filicum,sive, Enumeratio omnium generum specierumque filicum et Hydropteridum ab anno 1753 ad finem anni 1905 descriptorium : adjectis synonymis principalibus, area geographica, etc }, volume = {Suppl. 4 1934-60}, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection.}, url = {https://www.biodiversitylibrary.org/item/9247}, note = {https://www.biodiversitylibrary.org/bibliography/402}, publisher = {Hafniae [Copenhagen], H. Hagerup, 1906}, author = {Christensen, Carl,}, year = {1934}, pages = {382}, keywords = {Bibliography|Indexes|Nomenclature|Pteridophyta}, }