A study of mental fatigue in relation to the daily school program / W.H. Heck.
- Heck, W. H. (William Harry), 1879-1919.
- Date:
- 1913
- Books
About this work
Publication/Creation
Lynchburg, Va. : J. P. Bell, printers, 1913.
Physical description
28 pages : diagram ; 24 cm
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Where to find it
Location Status Access Closed storesK46726