Isaacs, Susan Sutherland Fairhurst, 1885-1948. Intellectual growth in young children / by Susan Isaacs ; with an appendix on children's "why" questions by Nathan Isaacs. - New York : Harcourt, Brace, 1930. - xi, 370 p. ; 22 cm. include index ISBN: 0710061870 Subjects--Topical Terms: Child development.Educational psychology. Dewey Class. No.: 370.15