Principles and methods of teaching geography /
Holtz, Frederick L.
Principles and methods of teaching geography / Frederick L. Holtz. - New York : Macmillan and Cº, 1919. - XII, 360 p. ; 19 cm.
Principles and methods of teaching geography / Frederick L. Holtz. - New York : Macmillan and Cº, 1919. - XII, 360 p. ; 19 cm.
