In doing some searching around, I found that the museum has several
books for sales that might not be readily available elsewhere.  In
addition to the cones co-authored by duPont, there appears to be one
by our own B.J. Piech.
 
Sylvia
 
http://www.delmnh.org/pubnf.htm
 
Mollusk Publications:
 
Living Volutes, a monograph of the Recent Volutidae of the World, by
C.S. Weaver & J.E. du Pont. 1970. Covers 200 species with 79 colored
plates, including photographs of living animals, maps, anatomical
drawings, and complete synonymies. 375 pp. Hard cover. $25.00 + 4.00
 
Exotic Conchology, by William Swainson (1841). A faithful 1968
facsimile reproduction, edited by Dr. R. Tucker Abbott, with a modern
appendix of names. 48 colored plates. Hard cover. $25.00 (postpaid)
 
Index Nudibranchia, a catalog of the literature on marine shell-less
gastropods from 1554 through 1965, by Henry D. Russell. 7,000 entries,
24,00 titles, 3,500 subject and geographical cross references. 141 pp.
Plasticized soft-cover. $10.00 (postpaid)
 
Ranellidae and Personidae: a Classification of Recent Species, by B.J.
Piech, 1995. A catalog of taxonomic names for two gastropod families,
covering 160 species and subspecies. 60 pp. Coil-bound. $12.00
(postpaid)
 
Indo-Pacific Mollusca, a monograph of the marine mollusks of the
world, with special emphasis on those of the Indian and western
Pacific Oceans, edited by R. Tucker Abbott, 1959-1976. Nos. 1-5
out-of-print. Complete set of nos. 6-17, punched for three-ring
binders, includes three binders and guide tabs. $125.00 +$5.00