Rufus, W. Carl (October 1944), "Telescopic Astronomy in America before 1843", Publications of the Astronomical Society of the Pacific, 56 (332): 192, Bibcode:1944PASP...56..192R, doi:10.1086/125650.
harvard.edu
ui.adsabs.harvard.edu
Rufus, W. Carl (October 1944), "Telescopic Astronomy in America before 1843", Publications of the Astronomical Society of the Pacific, 56 (332): 192, Bibcode:1944PASP...56..192R, doi:10.1086/125650.
Kilgour, Frederick G. (December 1949), "The Rise of Scientific Activity in Colonial New England", Yale Journal of Biology and Medicine, 22 (2): 123–138, PMC2598802, PMID15407774.
pubmed.ncbi.nlm.nih.gov
Kilgour, Frederick G. (December 1949), "The Rise of Scientific Activity in Colonial New England", Yale Journal of Biology and Medicine, 22 (2): 123–138, PMC2598802, PMID15407774.