Hello!
The Pilsbry monograph "Land Mollusca of North America (North of Mexico)"
Vol I, part 1 & 2 and Vol II, part 1 & 2 (a 4 book set) is available from
the
Academy of Natural Sciences of Philadelphia. The pubs website page is at;
http://www.acnatsci.org/research/index.html?/scipubs/index
The books are listed in the bibliography table as follows;
No. 3
Pilsbry, Henry A. 1939, 1940,
1946, 1948. Land Mollusca of
North America (North of
Mexico). Two volumes, four parts.
573 pp., 419pp., 520pp., 592 pp.
Respectively.
Price per part:
$35.00
I do not know if they are soft or hard cover. I obtained my set some time
ago
and had them bound. However I think the Academy used to also sell them
hard bound and soft bound.
Later,
Emilio Jorge Power
Please visit;
"The Liguus Home Page"
http://www.geocities.com/Eureka/Gold/9440/liguus/lighompa.html
"The Polymita Homepage"
http://www.geocities.com/Eureka/Gold/9440/polymita/polyhompg.html
West Melbourne, Florida USA