TY - BOOK ID - 137948413 TI - Performance tests of a Smith "Lifetime" impingement type air filter AU - Watson, Thomas W. AU - Robinson, Henry E. AU - United States. PY - 1958 PB - Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, DB - UniCat KW - Air filters KW - Testing. UR - https://www.unicat.be/uniCat?func=search&query=sysid:137948413 AB - ER -