{"publishers": ["National Bureau of Economic Research"], "subject_place": ["Europe"], "lc_classifications": ["HC10 .N38 no. 43"], "key": "/books/OL1043490M", "authors": [{"key": "/authors/OL381812A"}], "publish_places": ["Cambridge, MA"], "subject_time": ["19th century."], "pagination": "28, [23] p. :", "source_records": ["marc:marc_records_scriblio_net/part24.dat:11139155:789", "marc:marc_loc_updates/v37.i22.records.utf8:7075045:798", "marc:marc_loc_2016/BooksAll.2016.part23.utf8:75191162:798", "marc:marc_uic/UIC_2022.mrc:101412730:1513"], "title": "What drove the mass migrations from Europe in the late nineteenth century?", "lccn": ["93242371"], "number_of_pages": 28, "languages": [{"key": "/languages/eng"}], "subjects": ["Alien labor -- History -- 19th century", "Europe -- Emigration and immigration -- History -- 19th century"], "publish_date": "1992", "publish_country": "mau", "series": ["NBER working paper series on historical factors in long run growth ;", "historical paper no. 43"], "by_statement": "Timothy J. Hatton, Jeffrey G. Williamson.", "works": [{"key": "/works/OL2621096W"}], "type": {"key": "/type/edition"}, "oclc_numbers": ["27302386"], "latest_revision": 7, "revision": 7, "created": {"type": "/type/datetime", "value": "2008-04-01T03:28:50.625462"}, "last_modified": {"type": "/type/datetime", "value": "2022-07-11T14:58:41.136718"}}