371.2 B <a id="rdfa" resource="" property="dc:creator" href="http://viaf.org/viaf/96796850" target="_new">Barr, Arvil Sylvester, 1892-</a> Supervision; principles and practice in the improvement of instruction, by A.S. Barr, William N. Burton [and] Lee J. Bruckner. New York, D. Appleton-Cotury company, incorporated [.1938] viii, 981 p. incl. tables. diagrs. forms. 22 cm Bibliography at and of each chapter: "Readings on the historival background of the curriculum " : p. 965-969.