Developing science and art of minerals surveying / Proceedings VIth international congress international society for mine surveying Harrogate/ 9-13 September 1985 - Boston: A. A. Balkema, 1985 - 546p. Subjects--Topical Terms: Developing Subjects--Index Terms: Minerals Universal Decimal Class. No.: 622.1(082.2)=00 / M5.1