Browne, M. A. E. Sand and gravel resources of the Central Region, Scotland / M. A. E. Browne. - London: Her Majesty's Stationery Office, 1977. - iv, 27 p. : maps ; 30 cm. - Institute of Geological Sciences : Natural Environment Research Council. 77/9 . Includes bibliographical references (p. 25). ISBN: 0118840169 Subjects--Topical Terms: GravelGravel--ScotlandSand Dewey Class. No.: 553.62411