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The identification of functional regions based on lifetime migration data: a case study of Iran.

"This paper presents the results of a national functional regionalization [in Iran] utilizing factor-analytic techniques and migration data. An analysis of gross migration flow data along with information concerning existing road linkages resulted in eleven distinct macro-regional subsystems." Similarities with previous schemes are discussed. Data were obtained from information gathered for 146 counties as a part of the 1966 general census