Clyde W. Tombaugh Papers,

Clyde W. Tombaugh Papers. Ms 0407. Archives and Special Collections Department. New Mexico State University Library.

Clyde W. Tombaugh Papers. Ms 0407. Archives and Special Collections Department. New Mexico State University Library. https://nmarchives.unm.edu/repositories/18/resources/4562 Accessed November 21, 2024.