por Phillips, Charles [autor] | Phillips, Charles. 50 puzzles for creative thinking | Merlos, Silvina [traductor].
por Phillips, Charles [autor] | Jáuregui Lorda, Graciela [traductor] | Phillips, Charles. Brain-balance booster.
por Phillips, Charles [autor] | Jáuregui Lorda, Graciela [traductor] | Phillips, Charles. Brain-balance workout.