TY - GEN AU - Edelman, Seymour AU - Roth, Steven C AU - Mayo-Wells, J Franklin C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1975-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.75-776 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1975 TI - Investigation of two techniques for application in test methods for detecting defects in spacecraft thermal-protection material: ER -