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Volume 18(10);  October 1932
The cover of the journal
Genetics
Chromosome Rings on Oenothera, Drosophila and Maize
Sterling Emerson
Proc Natl Acad Sci U S A. 1932 October; 18(10): 630–632.
PMCID: PMC1076298
Geology and Paleontology
The Foraminiferal Genus Orbitolina in Guatemala and Venezuela
Thomas Wayland Vaughan
Proc Natl Acad Sci U S A. 1932 October; 18(10): 609–610.
PMCID: PMC1076295
Cretaceous Orbitoidal Formanifera from the Gulf States and Central America
T. Wayland Vaughan and W. Storrs Cole
Proc Natl Acad Sci U S A. 1932 October; 18(10): 611–616.
PMCID: PMC1076296
Structure and Correlation of Metamorphic Rocks in Southeastern New York
Robert Balk
Proc Natl Acad Sci U S A. 1932 October; 18(10): 616–630.
PMCID: PMC1076297
Journal Matter
Administrative content — journal masthead, notices, indexes, etc.
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