TY - BOOK A1 - / organized by the Institution of Mining and Metallurgy in association with the Institution of Civil Engineers and the Institution of Mining Engineers, and held in Harrogate, England, from 5 to 7 June, 1989 TI - Shaft engineering PB - کتابخانه دانشکدگان فنی 1 دانشگاه تهران SN - 101096836 UR /book/101096836/Shaft-engineering/ ER -