TY - RPRT TI - Disclosures on a transrotor engine, high temperature platinum resistance thermometer, dynamic analog correlation system, and combination metering and safety valve for filling sonde ballons with hydrogen. Editors: David Robbins and Alvin J. Englert. AU - Robbins, David PY - 1967 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 295 DO - 10.6028/NBS.TN.295 ER -