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× The speech of former President Herbert Hoover titled "Engineers," delivered on November 7, 1951, at the Waldorf-Astoria in New York, to raise funds for the Columbia University Engineering Center campaign. Engineers $150.00
$150.00
× Signed first U.K. edition of The Order of Time by Carlo Rovelli. The Order of Time $350.00
$350.00

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Subtotal $500.00
Total $500.00

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