Hake, Jonathan C Twelve problems in biology: open-ended experiments for introductory college biology / / Jonathan C. Hake, Jeffrey J. W. Baker and Garland E. Allen. - Reading, Mass.: Addison-Wesley, 1971. - xi, 191 p. : ill. ; 28 cm. Includes bibliographies. ISBN: 0201003791 Subjects--Topical Terms: Biology--Experiments