TY - RPRT TI - Experimental evaluation of analytical methods for determining lead in paint and building materials: milestone 2a, interim report of progress October 1 - November 15, 1971 AU - Greifer, Bernard AU - Durst, Richard AU - Menis, Oscar PY - 1972 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 10674 DO - 10.6028/NBS.RPT.10674 ER -