@COMMENT { BibTex package created from National Library of Australia Catalogue https://catalogue.nla.gov.au } @Book{ nla.cat-vn2015701, author = { Sowerby, A. L. M. }, title = { Lens-testing chart complete with instruction manual }, publisher = { Iliffe [London] }, year = { 1950 }, type = { Book }, language = { English }, subjects = { Lenses. }, life-dates = { 1950 - }, catalogue-url = { https://nla.gov.au/nla.cat-vn2015701 }, }