Hatfield, Larry L. Investigating mathematics : an interactive approach / Larry L. Hatfield - New York, N.Y.: Glencoe/McGraw-Hill, c1994. - xii, 352 pages : color illustrations ; color photographs ; 26 cm. Includes index. ISBN: 067513160X Subjects--Topical Terms: Mathematics--Research. Dewey Class. No.: CIR 510 H362 1994