Ramsden, E. N. Air : selected topics / E.N. Ramsden, R.E. Lee. - 2nd ed. - Leckhampton, Cheltenham : Stanley Thornes, 1990. - 74 p. : ill. - Extending science ;vno. 1 . ISBN: 0748704493 LCCN: 92015066 Subjects--Topical Terms: Air.