Galactic and Extragalactic Studies: XI. Note on the Period-Frequency of Galactic Cepheids. [PDF]
Proc Natl Acad Sci U S A, 1940 Shapley H.
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Galactic and Extragalactic Studies: V. The Period Frequency of Classical Cepheids in the Magellanic Clouds. [PDF]
Proc Natl Acad Sci U S A, 1940 Shapley H, McKibben V.
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A Study of the RV Tauri Variables. [PDF]
Proc Natl Acad Sci U S A, 1942 Payne-Gaposchkin C, Brenton VK.
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Galactic and Extragalactic Studies: XIX. Giant Variable Stars of the Loop Nebula (30 Doradus). [PDF]
Proc Natl Acad Sci U S A, 1948 Shapley H, Nail VM.
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Magellanic Clouds: II. Supergiant Red Variable Stars in the Small Cloud. [PDF]
Proc Natl Acad Sci U S A, 1951 Shapley H, Nail VM.
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Summary of Investigations of Variable Stars. [PDF]
Proc Natl Acad Sci U S A, 1936 Shapley H.
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Galactic and Extragalactic Studies: VIII. A New Determination of the Period-Luminosity Curve. [PDF]
Proc Natl Acad Sci U S A, 1940 Shapley H.
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Galactic and Extragalactic Studies: XVI. Photographic Amplitudes of Classical Cepheids. [PDF]
Proc Natl Acad Sci U S A, 1942 Shapley H.
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On the Dimensions and Constitution of Variable Stars. [PDF]
Proc Natl Acad Sci U S A, 1942 Payne-Gaposchkin C, Gaposchkin S.
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Galactic and Extragalactic Studies: VII. Magnitudes of Forty Cepheids in the Large Magellanic Cloud. [PDF]
Proc Natl Acad Sci U S A, 1940 Shapley H, McKibben V, Mohr J.
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