TY - BOOK ID - 137226215 TI - Le Play : engineer and social scientist : the life and work of Frederic Le Play. PY - 1987 PB - Ann Arbor UMI DB - UniCat KW - Le Play, Pierre Guillaume Frédéric UR - https://www.unicat.be/uniCat?func=search&query=sysid:137226215 AB - ER -