Dykens, Elisabeth M. Behavior and development in fragile X syndrome / Elisabeth M. Dykens, Robert M. Hodapp [and] James F. Leckman - London : SAGE, [n.d.] - xiv, 130 p. : ill. ; 22 cm. ISBN: 0803948875 : USD 34.00 Subjects--Topical Terms: Developmental psychologyBehaviorism (Psychology) Dewey Class. No.: 155.452