Text ( visual ) : unmediated Understanding children's play / Ruth E. Hartley, Lawrence K. Frank and Robert M. Goldenson ; prefatory note by Newton Bigelow. -- : set ; . -- London : Routledge , 1999. -- xvi, 372 p. ; 23 cm. -- (International library of psychology ; 72 . Developmental psychology ; 10). -- Reprint. Originally published: Routledge and K. Paul, 1952 ; Includes bibliographical references (p. [356]-362) and index. -- ISBN 041521128X ; 0415209900 ; (BA43484955) ; https://ci.nii.ac.jp/ncid/BA43484955 Author Heading(s): Hartley, Ruth E. ; Frank, Lawrence K. (Lawrence Kelso) ; Goldenson, Robert M. ; Bigelow, Newton