PT  - JOURNAL ARTICLE
AU  - Wetherby, A. G.
TI  - On the geographical distribution of certain fresh-water mollusks of North America, and the probable causes of their variation
AID  - 10.2475/ajs.s3-23.135.203
DP  - 1882 Mar 01
TA  - American Journal of Science
PG  - 203--212
VI  - s3-23
IP  - 135
4099  - http://www.ajsonline.org/content/s3-23/135/203.short
4100  - http://www.ajsonline.org/content/s3-23/135/203.full
SO  - Am J Sci1882 Mar 01; s3-23