books.google.de - Zeng Yi is a Professor at the Center for the Study of Aging and Human Development and Geriatric Division / Dept of Medicine of Medical School, and Institute of Population Research and Dept. of Sociology, Duke University. He is also a Professor at the China Center for Economic Research, National School...https://books.google.de/books/about/Demography_Volume_II.html?id=AG01CwAAQBAJ&utm_source=gb-gplus-shareDemography - Volume II
