Then And Now / [sound recording]. Bronfenbrenner, Urie, 1917-2005. Families United States. HQ536 RZA 0021 823.9 MAT Lectures. Durations: 60 min. each. Descriptive leaflet in pocket of container. Cambridge, Mass. : Harvard University Press, c1979. c1979. 1979 Sound 6 sound cassettes. eng The Harvard seminar series United States.