Q. My relative was in foreign countries with the Armed Forces during the censuses of 1950, 1960 and 1970. Where are these records kept?

A. Federal censuses, taken every 10 years since 1790, are some of the most useful genealogical sources. Records can provide ages, birthplaces, marital status and immigration and military service information. Laws restrict access to censuses for 72 years; enumerations from 1930 and before are available online at Ancestry.com <Ancestry.com > (by subscription) and HeritageQuest Online <heritagequestonline.com> (free through subscribing libraries), and on microfilm at many libraries.