Note 52 — Chapter XX · PLUTO FOUND[46]
Reading edition
“The Astronomical Romance of Pluto”—Professor A. O. Leuschner—Publications of The Astronomical Society of the Pacific, August, 1932.
Reading edition
“The Astronomical Romance of Pluto”—Professor A. O. Leuschner—Publications of The Astronomical Society of the Pacific, August, 1932.