. . "Problems, exercises, etc"@en . . "Exercising yourself smarter : brain building"@en . . . "Gimnasia cerebral : La persona con el cociente intelectual más alto del mundo le enseña a desarrollar la capacidad de su cerebro en 12 semanas" . . "Brain building in just 12 weeks"@en . "Brain building in just 12 weeks" . . "Gimnasia cerebral : la persona con el cociente intelectual más alto del mundo le enseña a desarrollar la capacidad de su cerebro en \"12 semanas\""@es . "Brain building" . "Brain building"@en . . . . "The \"smartest person in the world\" has written the ultimate illustrated how-to book, a program designed to improve our most powerful natural tool--the brain."@en . . . . "Provides hundreds of specific brainbuilding exercises designed to stretch and enhance your mind." . "Gimnasia cerebral"@es . "Gimnasia cerebral" . . . "Brain building : exercising yourself smarter"@en . "Brain building : exercising yourself smarter" . . . . . . "Problems and exercises"@en . "Problems and exercises" . . . "Exercising yourself smarter"@en . . . . . "Brain building exercise yourself smarter" . . . . . "Brain building in just twelve weeks"@en . . . . "Disciplina mental." . . "Spomin Psihotehnike Priročniki." . . "Mišljenje Psihotehnike Priročniki." . .