"skinner, charles e. "
Educational psychology: / Charles.E. Skinner - 4 ed. - uk : pentice-hall 1959. - "x, 755p.; 21 cm."
LB1051 / .S58 1958
Educational psychology: / Charles.E. Skinner - 4 ed. - uk : pentice-hall 1959. - "x, 755p.; 21 cm."
LB1051 / .S58 1958