TY - RPRT TI - Investigation of two techniques for application in test methods for detecting defects in spacecraft thermal-protection material AU - Edelman, Seymour AU - Roth, Steven C AU - Mayo-Wells, J Franklin PY - 1975 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 75-776 DO - 10.6028/NBS.IR.75-776 ER -