[Part 1: Biological Sciences] || Correction: Purification and Characterization of trp Aprorepressor.Proceedings of the National Academy of Sciences of the United States of America · 1983

[Part 1: Biological Sciences] || Purification and Initial Characterization of Rat Interleukin 2Giovanni Di Sabato · Proceedings of the National Academy of Sciences of the United States of America · 1982

[Part 1: Biological Sciences] || Purification and Characterization of Trp AporepressorAndrzej Joachimiak, Richard L. Kelley, Robert P. Gunsalus, Charles Yanofsky and Paul B. Sigler · Proceedings of the National Academy of Sciences of the United States of America · 1983

[Part 1: Biological Sciences] || Purification and Properties of a Pea Chloroplast DNA PolymeraseR. L. McKown and K. K. Tewari · Proceedings of the National Academy of Sciences of the United States of America · 1984

[Part 1: Biological Sciences] || Isolation, Purification, and Characterization of Mouse Placental LactogenPeter Colosi, Gregory Marr, Joanne Lopez, Luis Haro, Linda Ogren and Frank Talamantes · Proceedings of the National Academy of Sciences of the United States of America · 1982

[Part 1: Biological Sciences] || Purification and Properties of the uvrA Protein from Escherichia coliErling Seeberg and Anne-Lill Steinum · Proceedings of the National Academy of Sciences of the United States of America · 1982

[Part 1: Biological Sciences] || Purification and Characterization of Sheep Brain Cold-Stable MicrotubulesFabienne Pirollet, Didier Job, Edmond H. Fischer and Robert L. Margolis · Proceedings of the National Academy of Sciences of the United States of America · 1983

[Part 1: Biological Sciences] || Purification, Primary Structure, and Homology Relationships of a Chloroplast Ribosomal ProteinMarius Bartsch, Makoto Kimura and Alap-Raman Subramanian · Proceedings of the National Academy of Sciences of the United States of America · 1982

Two Empires or Three?Ernst Mayr · Proceedings of the National Academy of Sciences of the United States of America · 1998

The Objects of SelectionErnst Mayr · Proceedings of the National Academy of Sciences of the United States of America · 1997

Generalized Riemannian GeometryLuther P. Eisenhart · Proceedings of the National Academy of Sciences of the United States of America · 1962

On Monothetic GroupsPaul R. Halmos and H. Samelson · Proceedings of the National Academy of Sciences of the United States of America · 1942

Stochastic Speculative PricePaul A. Samuelson · Proceedings of the National Academy of Sciences of the United States of America · 1971

Supplement || Front MatterProceedings of the National Academy of Sciences of the United States of America · 1983

Supplement || Biological Sciences Subject IndexProceedings of the National Academy of Sciences of the United States of America · 1983

Supplement || Physical Sciences Subject IndexProceedings of the National Academy of Sciences of the United States of America · 1983