by Donald W. Meinig for Mormon culture published in 1970, and
* "Source area" by Fred Kniffen (1965) and later Henry Glassie (1968) for house and barn types.
** Outside a core area, Glassie used Meinig's use of the terms "domain" (a dominant area) and "sphere" (area influenced but not dominant).

Cultural "spheres of influence" may also overlap or form concentric structures of macrocultures encompassing smaller local cultures. Different boundaries