372.4
Gray, Clarence Truman , 1877- 
.... Types of reading ability as exhibet through test and laboratory experiments ; an investigation subsidized by the general education board , by Clarence Truman Gray . Chicago . ill . , The University of Chicago press (1917)
xii , 196 p. ilus. láms . 24 cm. (Suplementary educational monographs (Univ. of Chicago . School of Education ) vol. I . , No. 5)