Lafferty, Peter The Universal forces / Peter Lafferty. - East Sussex, England : Wayland c1990. - 48 p. : ill. ; 29 cm. - (The Wayland library of science and technology) . Includes index. ISBN: 1852108606 (Hb.) Subjects--Topical Terms: Science--Encyclopedias.Technology--Encyclopedias.Physics. LC Class. No.: Q121 / .L332 1990