@article {130, title = {The ascidians collected by the United States Fisheries Bureau Steamer Albatross on the coast of California during the Summer of 1904}, journal = {University of California Publications in Zoology}, volume = {4(1)}, year = {1907}, pages = {1-52}, chapter = {1}, author = {Ritter, W.E.} } @article {257, title = {Die ascidien der russichen Polar expedition 1900-1903}, journal = {Zoologischer Anzeiger}, volume = {31}, number = {17-18}, year = {1907}, pages = {521-525}, author = {Redikorzev, V.} } @inbook {192, title = {Tunicaten.}, booktitle = {Ergebnisse der Hamburger Magalhaensischen Sammelreise}, volume = {8}, year = {1907}, pages = {1-84}, publisher = {L. Friederichsen \& Co.}, organization = {L. Friederichsen \& Co.}, edition = {5}, address = {Hamburg}, author = {Michaelsen, W.} }