TY - BOOK ID - 136861786 TI - Causal thinking in the health sciences : concepts and strategies of epidemiology PY - 1973 SN - 0192649159 PB - London Oxford university DB - UniCat KW - Epidemiology UR - https://www.unicat.be/uniCat?func=search&query=sysid:136861786 AB - ER -