TY - RPRT TI - Nonmetallic coatings for concrete reinforcing bars: quarterly progress report no. 2 January 1, 1972 to March 31, 1972 AU - Clifton, James R AU - Mathey, Robert G AU - Cilimberg, Ramon L PY - 1972 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 10857 DO - 10.6028/NBS.RPT.10857 ER -