El- Malik, Walied M. H. Minerals investment under the Shari'a law / Walied M. H. El-Malik. - London : Graham & Trotman, 1993. - 148 p. ; 24 cm. - International Energy and Resources Law and Policy series . p.135-138 ISBN: 1853339075 Subjects--Topical Terms: Mining law (Islamic law)Contracts (Islamic law)