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The address of the Livermore Heritage Guild is: Po Box 961, Livermore, CA 94551-0961
The address of the Livermore-Amador Genealogical Society is: Po Box 901, Livermore, CA 94551-0901
The phone number of the Livermore Heritage Guild is: 925-449-9927.
Yes, it is a city in Northern California.
Since it is in the bay area it is considered to be in northern California.