Desportes, I. & Perkins, F.O., 1990. 3. Phylum Paramyxea. In L. Margulis et al. (eds.), Handbook of Protoctista: 30-35.
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Perkins, F.O., 1990. 2. Phylum Haplosporidia. In L. Margulis et al. (eds.), Handbook of Protoctista: 19-29.
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Perkins, F.O., 2000. Class Perkinsasida Levine, 1978. In Lee, J.J., Leedale, G.F. & Bradbury, P., An Illustrated Guide to the Protozoa, Second Edition, vol. 1. Society of Protozoologists, Lawrence, Kansas, U.S.A.: 200-202.
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Perkins, F.O., 2000. Class Conoidasida Levine, 1988. In Lee, J.J., Leedale, G.F. & Bradbury, P., An Illustrated Guide to the Protozoa, Second Edition, vol. 1. Society of Protozoologists, Lawrence, Kansas, U.S.A.: 202-339.
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Perkins, F.O., 2000. Phylum Haplosporidia Caullery & Mesnil, 1899. In Lee, J.J., Leedale, G.F. & Bradbury, P., An Illustrated Guide to the Protozoa, Second Edition, vol. 2. Society of Protozoologists, Lawrence, Kansas, U.S.A.: 1328-1341.
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Perkins, F.O., Barta, J.R., Clopton, R.E., Peirce, M.A. & Upton, S.J., 2000. Phylum Apicomplexa Levine, 1970. In Lee, J.J., Leedale, G.F. & Bradbury, P., An Illustrated Guide to the Protozoa, Second Edition, vol. 1. Society of Protozoologists, Lawrence, Kansas, U.S.A.: 190-369.
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