00421nam a2200157Ia 4500 0000007129 20251012174457.0 050503s1971 enk 000 0 eng d 0043301983 (cased) 9780043301982 (cased) Demand and supply Ralph Turvey. London Allen and Unwin 1971. 127 S ill. Angebot. swd Nachfrage. swd 4345 4345