Activity Listings
- Letter from R. C. Halter, Vice-President, The Society of Professional Chemists and Engineers, to LP RE: Asks if he could address them on a topic related to the professional and economic status of Chemists and engineers while in town visiting the Humble Oil Company. [Letter from LP to Halter, July 6, 1950] [Filed under LP Speeches: 1950s.19]
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