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Author  |
Title | Year | Publication | Serial | Volume | Pages |
|---|---|---|---|---|---|---|
| Keiper Rr, | The Przewalski horse ecosystem: programs and progress | 1986 | Majumdaret al : Endangered and threatened species programs in Pensylvania and other States | 1254 | ||
| Keiper Rr, | Population dynamics of feral ponies. | 1979 | Symposium on the Ecology and Behavior of wild and feral Equids | 1252 | 175-184 | |
| Keiper Rr, | Observations on the nocturnal behavior of feral ponies | 1977 | 1251 | 51 | 57-58 | |
| Keiper Rr, | Interactions between cattle egrets and feral ponies | 1976 | 1249 | 50 | 89-90 | |
| Keiper Rr, B.J. | Refuge – seeking and pest avoidance by feral horses in desert and island environments | 1982 | 1257 | 9 | 111-120 | |
| Keiper Rr, K.M. | Nocturnal activity patterns of feral ponies | 1980 | 1259 | 61 | 116-118 |