See, Astronomer, 96: Co-Founder of Observatory Dies – Disputed Einstein" The New York Times, July 5, 1962, p 22* Obituary, "Physics Today", volume 15(8), (August 1962) page 80* "The Sage of Mare Island" from The Astronomical Scrapbook, Joseph Ashbrook, 1984, Cambridge University Press, pp.
See, Astronomer, 96: Co-Founder of Observatory Dies — Disputed Einstein» The New York Times, Jul 5, 1962, p 22* Obituary, "Physics Today", volume 15(8), (August, 1962) page 80* «The Sage of Mare Island» from The Astronomical Scrapbook, Joseph Ashbrook, 1984, Cambridge University Press, pp.