High incidence of vanadium and copper in the titanomagnetite and ilmenite samples off Ratnagiri, Maharashtra, India. Indian J Geo-Mar Sci [Internet]. 2025 Jul. 18 [cited 2026 May 15];53(05):409-17. Available from: https://or.niscpr.res.in/index.php/IJMS/article/view/21674