TY - RPRT TI - Characterization of porosity in porous polymer implant materials : annual report for period April through September 1983 AU - Dehl, R E PY - 1984 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 84-2883 DO - 10.6028/NBS.IR.84-2883 ER -