Deunydd printiedig, 1909, 1937 a 1940, yn ymwneud â'r diwydiant wlân, yn cynnwys H. Ling Roth, Hand Woolcombing (1909); ac E. Kilburn Scott, 'The Shrinking of Woollens' (1937).

A copy of Nesta L. Harries's study entitled 'The Welsh Woollen Industry' written for her final examination at St Catharine's College, Tottenham, London, early 1950s, and containing samples of materials produced in woollen mills throughout Wales.