https://www.navy-net.co.uk/rrpedia/Useful_Recommendations_For_Making_Use_Of_Electronic_Mail_To_Marketplace_Spot…_Info_No._50_Of_505
https://www.navy-net.co.uk/rrpedia/Useful_Recommendations_For_Making_Use_Of_Electronic_Mail_To_Marketplace_Spot..._Info_No._50_Of_505