TY - BOOK ID - 129605863 TI - Three-generation Mobility in the United States, 1850-1940 : The Role of Maternal and Paternal Grandparents PY - 2016 PB - National Bureau of Economic Research DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:129605863 AB - ER -