31
Levin, Jeffrey S.
| The Gerontological Society of America |
1997
34
Nigg, Claudio R.
| The Gerontological Society of America |
1999
35
Pettit, Joseph
| University of Chicago |
2000
37
Angelelli, Joseph J.
| The Gerontological Society of America |
2000
38
Wallace, Steven P.
| The Gerontological Society of America |
2000
40
Taylor, Robert Joseph
| NASW Press |
2000