Ortmann, A. E. (Arnold Edward), 1863 1927, . books & textbook
South American Naiades : a contribution to the knowledge of the freshwater mussels of South America Volume vol. 8 no. 3
Ortmann, A. E. (Arnold Edward), 1863-1927, . Museum, Carnegie
Ulan Press /2012-08-31 Paperback / 264 Pages
A monograph of the Najades of Pennsylvania Volume vol. 4 no. 6
Ortmann, A. E. (Arnold Edward), 1863-1927, . Museum, Carnegie
Ulan Press /2012-08-31 Paperback / 76 Pages
South American Naiades; a contribution to the knowledge of the freshwater mussels of South America
Ortmann, A. E. (Arnold Edward), 1863-1927, .
Ulan Press /2012-09-23 Paperback / 270 Pages
