Whitford, Philip; Whitford, Kathryn (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume 69 (1981)
Osterbrock, Donald E.
Further links in the California-Wisconsin astronomical connection, pp. 153-162 PDF (4.7 MB)
Copyright 1981 Wisconsin Academy of Sciences, Arts and Letters.| For information on re-use, see http://digital.library.wisc.edu/1711.dl/Copyright