Определите, к какому виду делового документа относится представленный отрывок: Dear Sirs, Further to the recent discussions we had with Mr. Otten from Brown & Co. in London we would be grateful to you if you will send us your new catalogues for the latest model of refrigerator. If you can guarantee prompt delivery and can quote really competitive prices we shall be able to place an order with you for 250 refrigerators …