Ralph Garber (center), the new dean of the George Warren Brown School of Social Work at Washington University, talks with former deans of the school Benjamin Youngdahl (right), 55 South Gore ave., Webster Groves, and Wayne Vasey (left), now at the University of Michigan, Ann Arbor, Mich., at a reception for Dean Garber Sunday at Washington University. Dean Garber, 7 Princeton pl., was formerly assistant dean of social work at Rutgers University, New Brunswich, N. J. The School of Social Work Alumni Association will hold a dinner in honor of Dean Garber at 6:30 p.m. Wednesday at Luigi's restaurant, 12870 Manchester rd.