Text ( visual ) : unmediated Family situations : an introduction to the study of child behavior / by James H. S. Bossard and Eleanor S. Boll. -- Philadelphia : University of Pennsylvania Press ; London : H. Milford ; Oxford university Press , 1943. -- ix, 265 p. ; 24 cm. -- Bibliography: p. 243-260. -- (BA11445964) ; https://ci.nii.ac.jp/ncid/BA11445964 Author Heading(s): Bossard, James Herbert Siward ; Boll, Eleanor Stoker. -- Classification(s): LCC : HQ772 ; DC : 136.7. -- Subject Heading(s): LCSH : Child development ; LCSH : Family