Freeman, Ken. In Search of Dark Matter [electronic resource] / by Ken Freeman, Geoff McNamara. - New York, NY : Praxis Publishing Ltd., 2006. - xvi, 158 p. : ill., digital ; 24 cm. - Springer Praxis Books . ISBN: 9780387276182 (electronic bk.) 9780387276168 (paper) Subjects--Topical Terms: Dark matter (Astronomy) LC Class. No.: QB791.3 / .F74 2006 Dewey Class. No.: 523.1126