TY  - BOOK
AU  - Schirmer, Werner et.al.
TI  - Systems Theory for Social Work and the Helping Professions
SN  - 978-0-367-07690-0
U1  - Cir. 361.3 Sch35 C2019 
PY  - 2019///
CY  - New York
PB  - Routledge
ER  -