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by Walker, Sara Imari; Davies, Paul C. w.; Ellis, George F. r.
by Davies, Paul; Ellis, George R.; Ward, Keith
by Ellis, George F. R.; Williams, R. M.; Carfora, Mauro
by Ellis, George E. R.
by Edited by Jeff Murugan , Amanda Weltman , George F. R. Ellis
by George F. R. Ellis , Roy Maartens , Malcolm A. H. MacCallum
by Ellis, Arthur B.; Geselbracht, Margret J.; Johnson, Brian J.; et al.
by Stephen W. Hawking; George F. R. Ellis