Time drill
Subtitle: an introduction to geologic time
By: by Kevin P. Purcell.
Contributors: Geological Survey (U.S.)
Series: Open-file report -- 95-805A.; U.S. Geological Survey open-file report -- 95-805A.
Publisher: U.S. Dept. of the Interior, U.S. Geological Survey
Published: 1995
Place of publication: [Menlo Park, CA]
Language: eng
Number of pages: 48
Subjects: Geological time -- Study and teaching (Elementary)
Notes: Also available as floppy disk designed for Macintosh computers.

Includes bibliographical references (p. 13-16).