Note 9 — Chapter II · SOURCES OF OUR PRESENT KNOWLEDGE OF THE STARS.
Reading edition
“The Cape Photographic Durchmusterung” by David Gill and J. C. Kapteyn, Annals of the Cape Observatory, vol. III-V (1896-1900).
Reading edition
“The Cape Photographic Durchmusterung” by David Gill and J. C. Kapteyn, Annals of the Cape Observatory, vol. III-V (1896-1900).