The sand dollar and the slide rule : drawing blueprints from nature /Author: Willis, Delta.
Publisher: Reading, Mass. : Addison-Wesley,
Date: c1995. This title can be found in 2 Iowa libraries.
The Hominid Gang : behind the scenes in the search for human origins /Author: Willis, Delta.
Publisher: New York, N.Y., U.S.A. : Viking,
Date: 1989. This title can be found in 13 Iowa libraries.
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