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1Pillar of strength columnar cactus as a key factor in Yoreme heritage and wildland preservation Pillar of strength columnar cactus as a key factor in Yoreme heritage and wildland preservationby Semotiuk, Andrew J. autor/a, Colunga García Marín, Silvia Patricia autor/a, Valenzuela Maldonado, David autor/a, Ezcurra Real de Azua, Exequiel autor/aTexto bibliotecaECOSUR