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by Ravitch, Frank S.; Backer, Larry Catá
by Mavroudis, Constantine; Backer, Carl L.
by Benji Backer
by Bas Backer, Joris; Rajabali, Ameera
by Ravitch, Frank S.; Backer, Larry C.
by Sophie Backer
by Garcia Alves, Ignacio; Gonzalez, Juan; de Backer, Philippe
by Backer, Reiner
by Backer, Douglas R.
by Backer, Adam; Smith, Adam