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- _ _ _ _ _ The Six-Gun Mystique Sequel.
- CLEMENTE Fernández, María Dolores. El héroe del western. América vista por sí misma.
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- McVEIGH, Stephen. The American Western.
- _ _ _ _ _“The American West in 1890- a Pivotal Decade”. The American Western.
- WRIGHT, Will. SixGuns and Society. A Structural Study of the Western.
