Systematic observation of verbal interaction as a method of comparing mathematics lessons
By: [by] E. Muriel J. Wright [and] Virginia H. Proctor.  Prepared at Washington University, St. Louis.
Contributors: Proctor, Virginia H
Published: 1961
Place of publication: [St. Louis]
Language: eng
Number of pages: 233
Subjects: Mathematics -- Study and teaching
Notes: Microfilm. Washington, D.C., Library of Congress Photoduplication Service [n.d.]