Room, T. G. Miniquaternion geometry; an introduction to the study of projective planes [by] T. G. Room and P. B. Kirkpatrick. - Cambridge [Eng.] University Press, 1971. - viii, 176 p. illus. - Cambridge tracts in mathematics and mathematical physics. 60 . Subjects--Topical Terms: Geometry, Projective.Quaternions.Algebraic fields. Subjects--Index Terms: Miniquaternion geometry. Universal Decimal Class. No.: 514.142 / ROO