Thompson, R.J. The amplitude of solar cycle number 22 / R.J. Thompson. - Darlinghurst, N.S.W. : IPS Radio and Space Services, 1987. - 10 p. : ill. - IPS Radio and Space Services technical report, Doc no. IPS TR-87-03 0812-7395 ; . Spiral bound. LCCN: 89070097 Subjects--Topical Terms: Solar activity--Research.Solar cycle--Research.