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Use of and need for formal planning in retailing : searching for a typology
Laitinen, E. K., (1987)
Methoden der Konjunkturprognose : e. empir. Unters. mit zeitreihenanalyt. Verfahren
Nowak, Ralf, (1986)
A revised weighting scheme for indicators of effective exchange rates
Wickham, Peter, (1987)