Enumeration of latin squares with application to order 8

[1]  Albert Sade,et al.  An Omission in Norton's List of $7 \times 7$ Squares , 1951 .

[2]  H. W. Norton THE 7 × 7 SQUARES , 1939 .

[3]  Rory A. Fisher,et al.  The 6 × 6 Latin squares , 1934, Mathematical Proceedings of the Cambridge Philosophical Society.