TY - RPRT TI - Non-metallic antenna-support materials pultruded rods for antenna guys, catenaries and communications structures AU - Halsey, N AU - Marlowe, D E AU - Mitchell, RA PY - 1976 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 75-684 DO - 10.6028/NBS.IR.75-684 ER -