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National communications policy:

, In: The American economic review / publ. by the American Economic Association
Peck, Merton J. ; Johnson, Leland L. ; Levin, Harvey J..... (1970)  2 - p. 199-224
Exemplar:  Zentrale: z vwl 001 jc/649; Zentrale:Magazin Zs fc 1649