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1.
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Nurse rocks are more important than nurse plants in determining the distribution and establishment of globose cacti (Mammillaria) in the Tehuacan Valley, Mexico Peters, EM - Martorell-Delgado, Carlos - Ezcurra, E
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2.
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Globose cacti (Mammillaria) living on cliffs avoid high temperatures in a hot dryland of Southern Mexico Martorell-Delgado, Carlos - Patiño, P
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