By Bly, Robert W..
New York McGraw-Hill 1982 .
ix, 114 p. , 920430 0070061742 | 0070061734 (pbk.)

By Blake, Gary..
New York | Toronto Macmillan Pub. Co. | Collier Macmillan Canada | Maxwell Macmillan International 1991 .
xvii, 140 p. , Includes index. 22 cm..
002511445X