Escalona, Sibylle K. 1915- The roots of individuality : normal patterns of development in infancy / by Sibylle K. Escalona - London : Tavistock Publications, 1968 - ix, 547 p. : ill. ; 24 cm. Bibliography: p. 527-541. ISBN: 0422731307 LCCN: 67-027392 //r87 Subjects--Topical Terms: Infant psychology