Changes made by Council Regulation (EEC) No 1738/91 of 13 June 1991 fixing, for the 1991 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 Regulation (EEC) No 1331/90: Council Regulation (EEC) No 1331/90 of 14 May 1990 fixing, for the 1990 harvest, the norm and intervention prices and the premiums granted to purchasers of leaf tabacco, the derived intervention prices for baled tabacco, the reference qualities, the production areas and the guaranteed maximum quantities for the 1991 harvest and amending Regulation (EEC) No 1252/89