F L Whipple1. Show Affiliations » 1. Harvard College Observatory.
Abstract
Year: 1939 PMID: 16577876 PMCID: PMC1077725 DOI: 10.1073/pnas.25.3.118
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205