المؤلفون: Robert O. Rye, Us Geological Survey, Warren W. Wood, Ward E. Sanford, Shaun K. Frape, Warren W. Wooda, Ward E. Sanfordb, Shaun K. Frapec

المساهمون: The Pennsylvania State University CiteSeerX Archives

المصدر: http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article%3D1013%26context%3Dusgsrye.

Relation: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1033.1408; http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article%3D1013%26context%3Dusgsrye

الاتاحة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1033.1408
http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article%3D1013%26context%3Dusgsrye