3. These conglomerate structures grew incrementally without any overall plan. Their sense of unity was thus the product of common building materials as well as the result of adding, fitting, and adjusting the part to the whole, rather than subdividing a larger entity into discrete units. This process is characteristic of multiunit folk building throughout the world, where the structure directly reflects the process and to some degree the temporal staging by which it was realized. It becomes even more evident in multistory building construction and is characteristic of the dwellings of the Pueblo culture. See Pike, Anasazi ; and Nordenskiöld, The Cliff Dwellers of the Mesa Verde . For a concise account, see Breternitz and Smith, "Mesa Verde."