Gas rationing booklet. This is the back cover of the new "A" gasoline coupon book, which motorists in the East Coast rationed area will need to obtain their basic rations of gasoline when the coupon plan goes into effect in July. The book cover contains a statement requesting conservation of gasoline and tires. It also instructs finders of lost books to return them to the nearest rationing board. The book rations gasoline for the period of one year