Council Regulation (EEC) No 1252/89 of 3 May 1989 fixing, for the 1989 harvest, the norm and intervention prices and the premiums granted to purchasers of leaf tobacco, the derived intervention prices for baled tobacco, the reference qualities, the production areas and the guaranteed maximum quantities and amending Regulations (EEC) No 1577/86, (EEC) No 1975/87 and (EEC) No 2268/88