Michele 
This booklet, "Cartophilic Reference Book - No.16 : The Cigarette Card Issues of W.D. & H.O. Wills Parts I, II, and III (revised) and Part IV - An Official Checklist Compiled by A Committee of the Cartophilic Society of Great Britain Limited" (or RB.16), was edited by Edward Wharton-Tigar.
It was then printed, by whom we know not, as a booklet of forty pages and twenty eight illustrations which illustrated one hundred and eleven cards - and published as a limited edition of five hundred copies, in 1950, to be retailed, to Society members, at five shillings.
Like all our individual reference booklets, it was superseded by The World Tobacco Issues Index (RB.21), which was issued in 1956.
However we know that after that time these books still remained in stock as when the Cameric Club merged with the Cartophilic Society, this was amongst the books listed as part of a half price offer, so that former Camericans, and new members, could buy one. By that time the normal retail price had risen to nine shillings, but the offer reduced it to four shillings and six pence.