TY - BOOK ID - 138280619 TI - A mathematical model for use in evaluating and developing impact test methods for protective headgear AU - Berger, Robert E. AU - United States. PY - 1980 PB - Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:138280619 AB - ER -