Historical Immigration Policy dataset (HIP)
收藏DataONE2024-04-25 更新2025-04-26 收录
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https://search.dataone.org/view/sha256:01baa9e417e4f75d1e918b65a4b9dfc3ae48171b6a1e871ff1b6f69e9fe769f4
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资源简介：
HIP provides coding of immigration policies of 31 states from 1789/ independence to 2010. See codebook for more information
创建时间：
2024-09-24
