Umstattd, James Greenleaf, 1896- Secondary school teaching, [electronic resource] / by J.G. Umstattd.. — New ed.. — Boston, New York [etc.] : Ginn and Co., [1944]. — xii, 488 p. incl. forms, diagrs. 23 cm.
"Selected references for further study" at end of each chapter.
44003832
Teaching. Education, Secondary. High school. Unterricht.