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4. Camoens, J. K., R. E. McDowell, L. D. Van Vleck, and J. D. Rivera-Anaya. 1975. Holsteins in Puerto Rico. I. Influence of lactation length, days dry, days open, and calving interval on production traits. Univ. Puerto Rico J. Agr. 50:(In press).
5. Camoens, J. K., R. E. McDowell, L. D. Van Vleck, and J. D. Rivera-Anaya. 1975. Holsteins in Puerto Rico. III. Components of variance associated with production traits and estimates of heritability. Univ. Puerto Rico J. Agr. 50:(In press).