TY - BOOK ID - 134148393 TI - Social systems: essays on their persistence and change PY - 1960 PB - London : Van Nostrand, DB - UniCat KW - Social systems KW - Social change KW - Systèmes sociaux KW - Changement social UR - https://www.unicat.be/uniCat?func=search&query=sysid:134148393 AB - ER -