1.
Bulletins of American Paleonotlogy Vol. 58, Issue 259 : Revision of the North American Pleur...
by Parsley, R. L.
ISBN: 9780877101987
List Price: $4.00
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Bulletins of American Paleontology Vol. 100, No. 336 : Review of Selected North American Mit...
by Parsley, R. L.
ISBN: 9780877104186
List Price: $23.00