British Indian Ocean Territory Stamp Catalogues British Indian Ocean Territory2021 Scott Standard Postage Stamp Catalogue – Volume 1 (US & A-B)Buy This Book Onlineebay Stanley Gibbons 2020 Stamps Of The WorldBuy This Book Onlineebay Michel Ostafrika 2017Buy This Book OnlineBuy Now Stanley Gibbons Commonwealth Stamp Catalogue: Indian Ocean – 3rd EditionBuy This Book Online