TY - RPRT TI - Survey plans and data collection and analysis methodologies : results of a pre-survey for the magnitude and extent of the lead based paint hazard in housing AU - Hall, William AU - Ayers, Tyrone AU - Doxey, Dwight PY - 1974 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 74-426 DO - 10.6028/NBS.IR.74-426 ER -