Monograph of the Naiades of Pennsylvania . . Volume V 12Arnold Edward Ortmann · First published 2018Open the Tome
A Monograph of the Najades of Pennsylvania Volume no. 6; Volume 4Carnegie Museum, Arnold Edward Ortmann · First published 2018Open the Tome
Die Klassen und Ordnungen der ArthropodenArnold Edward Ortmann, A. 1828-1895 Gerstaecker · First published 2018Open the Tome
Mutual Affinities of the Species of the Genus Cambarus, and Their Dispersal over the United StatesArnold Edward Ortmann · First published 2018Open the Tome
South American Naiades; a Contribution to the Knowledge of the Freshwater Mussels of South AmericaArnold Edward Ortmann · First published 2018Open the Tome
Mexican, Central American, and Cuban cambariArnold Edward Ortmann · First published 1906Open the Tome
The geographical distribution of freshwater decapods and its bearing upon ancient geographyArnold Edward Ortmann · First published 1902Open the Tome
Die Decapoden-Krebse des Strassburger MuseumsArnold Edward Ortmann · First published 1891Open the Tome
