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- [24] RETAINED PLACENTA-TREATMENT AND BREEDING EFFICIENCY IN COWS INDIAN VETERINARY JOURNAL, 1978, 55 (12): : 982 - 985
- [28] SOME CURRENT VIEWS ABOUT IONOSPHERE BRITISH JOURNAL OF APPLIED PHYSICS, 1964, 15 (05): : 451 - +
- [30] Retained placenta in Friesian mares: reproductive performance after foal heat breeding versus breeding in a subsequent heat PFERDEHEILKUNDE, 2001, 17 (06): : 633 - +