Laboratory Saftey Puzzle

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Cárdenas. Magola and Cristina González. Back in 1810: the New Kingdom of León in the Era of Independence . Nuevo León: State Committee for the Commemoration of the start of National Independence and the Centennial of the Mexican Revolution, 2010. 137 p.

Cárdenas, Magola and Cristina González. Back in 1910: Nuevo Leon in the time of the Revolution. Nuevo León: State Committee for the Commemoration of the Start of National Independence and the Centennial of the Mexican Revolution, 2010. 155 p.