TY - RPRT TI - Circular of the Bureau of Standards no. 569: fused-quartz fibers- a survey of properties, applications, and production methods AU - Tighe, Nancy J PY - 1956 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 569 DO - 10.6028/NBS.CIRC.569 ER -