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Items: 3

1.

THE 6-INCH TRANSIT CIRCLE OF THE U. S. NAVAL OBSERVATORY.

Updegraff M.

Science. 1909 Mar 12;29(741):421. No abstract available.

PMID:
17778791
2.

ON THE POSITIONS OF THE NORTHERN CIRCUMPOLAR STARS.

Updegraff M.

Science. 1902 Oct 31;16(409):689-93. No abstract available.

PMID:
17816242
3.

ON THE MEASUREMENT OF TIME.

Updegraff M.

Science. 1902 Feb 7;15(371):216-20. No abstract available.

PMID:
17775604

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