00393nam a2200121   4500008004100000020001500041100002200056245006700078250001100145260006300156300003000219650002200249740417 1940                        eng u  a81239046061 aPrasad, Umeshwar.14aEconomic geology: economic mineral deposits.cUmeshwar Prasad.  a2d ed.  aNew Delhi,bCBS Publishers & Distributors Pvt. Ltd,c2013.  axvi, 319 p.billus., map. 0aGeology, Economic