@COMMENT { BibTex package created from National Library of Australia Catalogue https://catalogue.nla.gov.au } @Book{ nla.cat-vn4551239, author = { Leonard, Joseph W. }, title = { Research needs in coal mining / Joseph W. Leonard }, publisher = { Coal Research Bureau, West Virginia University Morgantown, W. Va }, pages = { 9 p. ; }, year = { 1973 }, type = { Book }, language = { English }, subjects = { Coal mines and mining -- Research. }, life-dates = { 1973 - }, catalogue-url = { https://nla.gov.au/nla.cat-vn4551239 }, }