TY - GEN AU - J K Taylor AU - E R Deardorff AU - C D Olson AU - R W Burke C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1973-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.73-400 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1973 TI - Preparation of simulated environmental filters containing quartz and clay: ER -