Howarth, R.F. A-level revision in statistics : (Mathematics) / by R.F. Howarth. - 1987 ed. - Merseyside, England : Richard Ball Pub., [1987?] - 104 p. ; 30 cm. Subjects--Topical Terms: Mathematical statistics--Problems, exercises, etc. Dewey Class. No.: 519.5076 / HOW