21
Gettys, W. Edward.
| McGraw-Hill |
1989
23
Wells, Dare A.,
| McGraw-Hill |
1983
24
Bruenn, Stephen W.
| Arco |
1968
27
Anderson, Elmer E.
| Saunders College Pub. |
1982
28
Giancoli, Douglas C.
| Prentice Hall |
1991
30
Taylor, John R.
| Prentice Hall |
1991