Semiannual progress report, 31 December 1969 - 1 July 1970
A semiannual technical progress report by B. A. Reese, issued in 1970 and distributed through NASA's technical report series for engineers working on propulsion and instrumentation research. The plates are high-contrast oscilloscope traces, a labeled 1000-cycle sine reference, and captioned halftone photographs of test-stand plumbing and valves, giving designers clean instrument waveforms, arrow-and-leader callout labels, and monospaced engineering lettering.
