Retardation in the elementary urban schools of Puerto Rico
By: by Oscar Emilio Porrata.
Series: University of Puerto Rico bulletin -- ser. X, no.1.; University of Puerto Rico bulletin -- ser. X, no. 1.
Publisher: The University
Published: 1939
Place of publication: Rio Piedras, P.R
Language: eng
Number of pages: 63
Subjects: Grading and marking (Students); Handicapped children.; Public schools -- Puerto Rico.
Notes: Thesis (M.A.)--University of Chicago, 1934.

Bibliography: p. 62-63.