11
12
Ruffin, Roy,
| Scott, Foresman |
1986
13
14
McCloskey, Donald N.
| Macmillan Pub. Co. ; |
1982
15
Thompson, Arthur A.,
| Prentice-Hall |
1985
16
17
Salvatore, Dominick.
| McGraw-Hill |
1983
18
McCloskey, Donald N.
| Macmillan Pub. Co. ; |
1982