Thompson, Paul D. The virus realm [by] Paul D. Thompson. Illus. by Mary Lybarger. - [1st ed.] - Philadelphia, Lippincott [1968] - 189 p. illus. 21 cm. - Introducing modern science . Bibliography: p. 181-182. LCCN: 68010763 Subjects--Topical Terms: Viruses. LC Class. No.: QR360 / .T49 Dewey Class. No.: 576/.64