TY - RPRT TI - Solar energy systems- standards for rubber seals AU - Stiehler, R D AU - Hockman, A AU - Enbree, E J AU - Masters, L W PY - 1978 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 78-1437 DO - 10.6028/NBS.IR.78-1437 ER -