@article{WoRMS:SourceID:6888, author = {Haeckel, E.}, journal = {Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology}, note = {Also digitized at Biodiversity Heritage Library}, title = {Report on the Siphonophorae. }, url = {https://www.biodiversitylibrary.org/page/3155485}, year = {1888} }