城市老年人子女亲属网与子女外亲属网差序性的实证研究——以烟台市向阳街道三居民小区为例
성시노년인자녀친속망여자녀외친속망차서성적실증연구——이연태시향양가도삼거민소구위례
A demonstrste investigation to the difference between family network and outside family network about old folks in city——A survey of three small section of Xiang Yang street in YanTai as case
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