TY - RPRT TI - Compatibility of protective coatings, materials, and liquid propellants : quarterly progress report no. 12 - October 1 to December 31, 1968 AU - Young, J P AU - Reid, G I AU - Lamb, V A PY - 1969 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 9976 DO - 10.6028/NBS.RPT.9976 ER -