Constant Friendship is an unincorporated community in Harford County, Maryland, United States. [1]
Constant Friendship took the name of the 18th-century farm of Thomas White, father of bishop William White. [2]
Since the 1980s, Constant Friendship and the surrounding area has experienced large-scale commercial and residential development. [3]
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: ISBN / Date incompatibility (help)39°28′13″N76°18′39″W / 39.47028°N 76.31083°W