The Asian Scientific Instruments Co.
The Chadha Scientific Agencies Co.
The Chadha International Co.
5496 Chadha Villa, Basti Harphool Singh, Sadar Thana Road, Delhi 110006 INDIA.
Phone No. : + 91 - 11 23613940, 23526743, 9811179290 Fax No. : + 91 - 11 23636339