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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 1988)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 2005)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 2006)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 2000)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 1998)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 2002)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 1992)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 1987)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 1997)
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(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 1999)