References
- American Society of Testing Materials (ASTM) . 2004 . Standards on Petroleum Products and Lubricants D 3238 – 3274 .
- Boner , C. J. 1970 . Manufacture and Application of Lubricating Grease , New York : Robert E. Krieger Co. .
- Dyni , J. R. 2000 . Oil shale . U.S. Geol. Surv., Denver , 8
- Eggins , S. M. 1997 . J. Chemical Geology, Including Isotope Geoscience , 134 : 311 – 326 .
- El-Adly , R. A. 1999 . J. of Synthetic Lubrication , 16 ( 14 ) [CSA]
- El-Adly , R. A. 6th International on Petroleum and Environment . February 18–20 .
- El-Adly , R. A. and Al-Wakeel , M. I. 1998 . J. of Faculty of Education, Ain-Shams Univ. Cairo 35 – 44 .
- Glenn , C. R. and Mansour , S. E. 1979 . Annals of the Geol. Surv. of Egypt , 9 : 388 – 407 . [CSA]
- Highley , D. E. 1990 . Britain's industrial mineral resources and their exploitation . Erzmetall , 43 ( 1 ) : 19 – 28 . [CSA]
- Institute of Petroleum . 1993 . IP Standards for Analysis and Testing of Petroleum and Related Products, 1 , London : Author .
- Maegdefrau , E. and Hofmann , U. 1937 . Die Kristallstruktur des Montmorillonits . Z. Krist. , 98 : 299 – 323 . [CSA]
- Zarkalis , V. S. , Duda , J. L. and Klaus , E. E. 1990 . J. of the Society of Tribologists and Lubrication Engineers , 46 ( 8 ) [CSA]