1. Proc. 8th Int. EMIS Conf. Low energy accelerators and mass separators;Spejewski,1973
2. Proc. Isotope separator on-line work-shop;Spejewski,1977
3. Catalog No. 44-841, Radio Shack Corporation, 500 One Tandy Center, Fort Worth, TX 76102, USA.
4. Model M093-FD07, The Superior Electric Company, 383 Middle Street, Briston, CT 06010, USA.
5. Model ES-250-A-N-119, Ferrofluidics Corporation, 144 Middlesex Turnpike, Burlington, MA 01803, USA.