@article{Thang1996,
author = {Thang, N.M. and Swenson, I. },
title= {Variations in Vietnamese marriages, births and infant deaths by months of the Julian calendar and years of the Vietnamese and Chinese astrological calendars},
year = {1996},
doi = {10.1017/S0021932000022434},
journal = {Journal of Biosocial Science },
volume = {28},
number = {3},
pages = {367--377},
}