1
Published: 1942
Superior document: Publications of the Observatory of the University of Michigan 8,12
2
Published: 1938
Superior document: Publications of the Observatory of the University of Michigan 7,2
3
Published: 1933
Superior document: Publications of the Observatory of the University of Michigan 5,7
4
Published: 1937
Superior document: Publications of the Observatory of the University of Michigan 6,12
5
Published: 1932
Superior document: Publications of the Observatory of the University of Michigan 4,13
6
Published: 1934
Superior document: Publications of the Observatory of the University of Michigan 6,2
7
Published: 1931
Superior document: Publications of the Observatory of the University of Michigan 4,2
8
9
Published: 1933
Superior document: Publications of the Observatory of the University of Michigan 5,9
10
Published: 1932
Superior document: Publications of the Observatory of the University of Michigan 4,10
11
Published: 1949
Superior document: Publications of the Observatory of the University of Michigan 9,3
12
Published: 1931
Superior document: Publications of the Observatory of the University of Michigan 4,3
13
Published: 1923
Superior document: Publications of the Astronomical Observatory of the University of Michigan 3,[16]
14
Published: [2016]
Superior document: Title is part of eBook package: De Gruyter University of Pennsylvania Press Package Archive 1898-1999
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