Authors: Pinney

Published in Kansas Univ. Sci. Bull, in 1908, in volume 4, pages 309-316

Created: 2011-06-04, modified: 2023-02-16

Authors: M E Pinney | R E Coker

Published in Nautilis, in 1934, in volume 48, pages 55-60

Created: 2013-09-28, modified: 2013-09-28