Burch, J. B. & Thompson, F. G. (1957). Three new Mexican land snails of the genus Humboldtiana. Occasional Papers of the Museum of Zoology, University of Michigan. 590: 1-11.
479367
Burch, J. B. & Thompson, F. G.
1957
Three new Mexican land snails of the genus Humboldtiana
Occasional Papers of the Museum of Zoology, University of Michigan