Text ( visual ) : unmediated PIE manual : Person-in-environment system . the PIE classification system for social functioning problems / by James M. Karls and Karin E. Wandrei. -- Washington, D.C. : NASW Press , c1994. -- vii, 65 p. ; 28 cm. -- Includes bibliographical references. -- ISBN 0871012545 ; (BA49734680) ; https://ci.nii.ac.jp/ncid/BA49734680 Author Heading(s): Karls, James M. ; Wandrei, Karin Evon ; National Association of Social Workers. -- Classification(s): LCC : HV43.5 ; DC20 : 361.1/014. -- Subject Heading(s): LCSH : Person-in-environment system