TY - GEN AU - Greenfeld, Sidney H C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1962-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.7589 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1962 TI - The application of x-ray projection microscopy to roofing asphalt systems: ER -