TY - JOUR A1 - Attar-Schwartz, S. A1 - Tan, J.P. A1 - Buchanan, A. A1 - Flouri, E. A1 - Griggs, J. T1 - Grandparenting and adolescent adjustment in two-parent biological, lone-parent, and step-families Y1 - 2009 DO - 10.1037/a0014383 VL - 23 IS - 1 ER -