Retardation in the elementary urban schools of Puerto Rico
Porrata, Oscar Emilio
Retardation in the elementary urban schools of Puerto Rico by Oscar Emilio Porrata. - Rio Piedras, P.R. The University 1939. - 63 p. ill. 24 cm. - University of Puerto Rico bulletin ser. X, no.1 .
Thesis (M.A.)--University of Chicago, 1934.
Bibliography: p. 62-63.
Grading and marking Students
Public schools--Puerto Rico.
Handicapped children
Retardation in the elementary urban schools of Puerto Rico by Oscar Emilio Porrata. - Rio Piedras, P.R. The University 1939. - 63 p. ill. 24 cm. - University of Puerto Rico bulletin ser. X, no.1 .
Thesis (M.A.)--University of Chicago, 1934.
Bibliography: p. 62-63.
Grading and marking Students
Public schools--Puerto Rico.
Handicapped children