The crawfishes of western Pennsylvania
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
A new species of Cambarus from Louisiana
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
The mutual affinities of the species of the genus cambarus, and their dispersal over the United States
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
The geographical distribution of freshwater decapods and its bearing upon ancient geography
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
Die Decapoden-Krebse des Strassburger Museums
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
Papers on Unionidae
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
Monograph of the naiades of Pennsylvania .. v 11
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
Monograph of the naiades of Pennsylvania .. v 12
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown
South American Naiades; a contribution to the knowledge of the freshwater mussels of South America
by
Ortmann, A. E. (Arnold Edward), 1863-1927
series:
Unknown
first published:
Unknown