voyages in developement Rathus, Spencer A. creator text Belmont Wadsworth, Cengage Learning 2014 monographic xlii, various pages. : ill., Col., ; 27 cm. Includes bibliographical references. Child development Infants development Observing children Germinal stage Embryonic stage Physical growth Nutrition FSSH ADCP 155.4 RAT 9781133956488 (pbk); 1133956483 (pbk)