1. Place theory operates upon structured systems of human needs and usage.2. These three tiers of settlements are the physical realization of central place theory . 3. Gera is a supra-centre according to the Central Place Theory in German regional planning. 4. Other influential theories include Walter Christaller's Central place theory , the theory of core and periphery. 5. For some underlying theory regarding physician location, see Central Place Theory . ( Smith, 1977, 1979) 6. The place theory is usually attributed to Hermann Helmholtz, though it was widely believed much earlier. 7. Market area studies provide another technique for using central place theory as a retail location planning tool. 8. "For the first time, " he added, " it places theories of galaxy formation on a firm observational footing ." 9. Place theory holds that the perception of pitch is determined by the place of maximum excitation on the basilar membrane.10. A widely postulated mechanism for pitch processing in the early central auditory system is the place theory of pitch perception. 
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