0. DOCID:11099 1927 "Research Notes from the Harvard Observatory" 0.0303953671112453
1. DOCID:2287 1891 "The Space-Penetrating Power of Large Telescopes" 0.0255995141475077
2. DOCID:2008 1890 "Study of the Surface-Markings of the Planets in 1890" 0.0210745768927587
3. DOCID:13253 1936 "The McDonald Observatory" 0.0206719210412407
4. DOCID:10721 1925 "On the Daylight Visibility of Stars from a Mine Shaft" 0.0204514570806811
5. DOCID:14439 1940 "Abstracts of Papers" 0.0191415910863796
6. DOCID:14366 1940 "The Active Region on the Sun's Surface" 0.0189767491110975
7. DOCID:14629 1941 "Note on an Erroneous Statement Concerning Pre-Nova Stars" 0.0184048685664904
8. DOCID:11940 1930 "The National Academy of Sciences. II" 0.0179665269373824
9. DOCID:2023 1890 "Mount St. Elias" 0.0177662566006479
10. DOCID:6975 1910 "The Naval Observatory: The Completion of the Catalogue of the Washington Zones of 1846-52" 0.017329299732105
11. DOCID:10508 1925 "Abstracts of Papers Presented at the Madison Meeting, November 9, 10 and 11" 0.01669273428135
12. DOCID:13044 1935 "Abstracts of Papers" 0.0164649373535149
13. DOCID:9294 1920 "Preliminary Results of Analysis of Light Deflections Observed during Solar Eclipse of May 29, 1919" 0.016291020794431
14. DOCID:2209 1890 "Annular Phase of Venus" 0.0160370190888191