[Evanston? Ill. : Harper & Row, Publishers, 1975 ; [s.l.] : Made by Bay State Productions.
Video — 1 film reel (20 min.) : sd., col. ; 16 mm. + 1 guide.
Presents the theory that there is an invarient sequence of milestones in psychological development which is characteristic of all human beings. Discusses the characteristics of infants, the growth of play, and cognitive development in the child.