title: Agricultural variation and human fertility in antebellum Pennsylvania.
authors.forename: G L
authors.initials: GL
authors.lastname: Laidig
authors.forename: W A
authors.initials: WA
authors.lastname: Schutjer
authors.forename: C S
authors.initials: CS
authors.lastname: Stokes
mesh_terms: D003710:Demography; D004470:Economics, Medical / Q000266:history*; D049711:History, Modern 1601-; D013223:Statistics as Topic / Q000266:history*; D014481:United States