TY - JOUR A1 - Fingerman, K.L. A1 - Pitzer, L.M. A1 - Chan, W. A1 - Birditt, K. A1 - Franks, M.M. A1 - Zarit, S. T1 - Who gets what and why? Help middle-aged adults provide to parents and grown children Y1 - 2011 DO - 10.1093/geronb/gbq009 JF - Journal of Gerontology: Social Sciences VL - 66B IS - 1 SP - 87 EP - -98 ER -