1
Spencer, Donald D.
| C. E. Merrill Pub. Co. |
1981
2
Olm, Kenneth W.
| C.E. Merrill Pub. Co. |
1985
3
Mellard, Charles W
| Merrill Pub. Co. |
1987
5
Maxim, George W.
| Merrill Pub. Co. |
1987
6
Spencer, Donald D.
| C.E. Merrill Pub. Co. |
1983