| Roth, T.L.; O'Brien, J.K.; MacRae, M.A.; Bellem, A.C.; Romo, S.J.; Kroll, J.L.; Brown, J.L., 2001. Ultrasound and endocrine evaluation of the ovarian cycle and early pregnancy in the Sumatran rhinoceros, Dicerorhinus sumatrensis. Reproduction 121: 139-149, figs. 1-5, table 1
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| MacInninch, M.D.; Bellem, A.C.; Macdonald, S.E.; Goodrowe, K.L.; Graham, L.H.; Brown, J.L.; Roth, T.L., 1999. Monitoring fecal progestogen metabolites in the Sumatran rhinoceros (Dicerorhinus sumatrensis) by enzyme immunoassay: p. 266
| In: Roth, T.L. et al. Seventh world conference on breeding endangered species: linking zoo and field research to advance conservation. Cincinnati, Zoo |
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