Umstattd, James Greenleaf, 4 0 1896-1988.

Secondary school teaching, 6 6 by J. G. Umstattd. - New ed. - - xii, 488 p. incl. forms, diagrs. 23 cm. - - - - - . - . - 0 . - . - 0 .



Selected references for further study at end of each chapter.



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