This journal provides immediate access to some articles. Volume 27(7); July 15, 1941 Genetics Female Sterility in Interracial Hybrids of Drosophila Pseudoöbscura PMCID: PMC1078334 Mathematics Groups Containing Maximal Subgroups of Prime Order PMCID: PMC1078335 On the Riemann Hypothesis in Function-Fields PMCID: PMC1078336 The Group Ring of a Locally Compact Group: I PMCID: PMC1078337 Conditional Invariants PMCID: PMC1078338 The Dirac Equation and Conditional Invariants PMCID: PMC1078339 Zoölogy and Anatomy Pigments from Marine Muds PMCID: PMC1078333 | ||