H Shapley1. Show Affiliations » 1. Harvard College Observatory, Cambridge, Massachusetts.
Abstract
Year: 1929 PMID: 16587492 PMCID: PMC522507 DOI: 10.1073/pnas.15.7.565
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205