TY - BOOK ID - 141987522 TI - Work Sampling AU - Heiland, Robert E. AU - Richardson, Wallace J. AU - McGraw-Hill Book Company PY - 1957 PB - New-York, Toronto, London McGraw-Hill Book Company DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:141987522 AB - ER -