Edward Michael Skeehan.
Geometrical week-day finder.
R601424. Geometrical week-day finder. By Edward Michael Skeehan. © 10Nov47; AA68970. Eva M. Skeehan (W), Mary Skeehan Minter, John C. Skeehan, Patricia Skeehan King & William K. Skeehan (C); 28Feb75; R601424.
Eva M. Skeehan|W||Mary Skeehan Minter, John C. Skeehan, Patricia Skeehan King & William K. Skeehan|C