الرئيسيةبحث

صورة:Mercury-element.jpg


Mercury - http://www.epa.gov/seahome/images/zenny_merc.jpe

Public domain This image is a work of an Environmental Protection Agency employee, taken or made during the course of an employee's official duties. As works of the U.S. federal government, all EPA images are in the public domain.

الصفحات التالية تحتوي على وصلة لهذه الصورة: