Dear Sir,   We are in need of the following article and would be grateful if a scanned pdf of the same could please be sent to us.   Hanson, W. B. and R. A. Heelis (1975), Techniques for measuring bulk gas motions from satellites, Space Sci. Instrum., 1, 493-524   Thanking you and with kind regards,   Dr. (Ms.) Smita Chandra Librarian Indian Institute of Geomagnetism Kalamboli-Panvel Highway New Panvel, Navi Mumbai 410 218   Phone: 91-22-2748 4000 / ext.4137 (Direct: 91-22-2748 4137) Fax: 91-22-2748 0762 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.