Watt, D. E. High sensitivity counting techniques / by D.E. Watt and D. Ramsden. - Oxford : New York /; Pergamon Press, c1964. - xv, 348 p. : illus. ; 23 cm. Includes bibliographies & Index. Subjects--Topical Terms: Nuclear counters. Dewey Class. No.: 539.77 / WAH 1964