Empirical foundations of educational research /
Sax, Gilbert
Empirical foundations of educational research / Gilbert Sax. - Estados Unidos : Prentice-Hall, c1968. - 443 p.
Educación--Investigación
Empirical foundations of educational research / Gilbert Sax. - Estados Unidos : Prentice-Hall, c1968. - 443 p.
Educación--Investigación