TY - RPRT TI - Surface protection of maraging steel : quarterly progress report no. 9 - January 1 to March 31, 1968 AU - Lamb, V A AU - Young, J P AU - Reid, G I PY - 1968 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 9834 DO - 10.6028/NBS.RPT.9834 ER -