共 50 条
- [1] DAIRY-HERD IMPROVEMENT LETTER [J]. AGRICULTURAL RESEARCH SERVICE PUBLICATION, 1978, (NNE-1): : 1 - 16
- [2] DAIRY-HERD IMPROVEMENT LETTER [J]. AGRICULTURAL RESEARCH SERVICE PUBLICATION, 1977, (NNE-6): : 1 - 16
- [4] DAIRY-HERD IMPROVEMENT LETTER - NATIONAL COOPERATIVE DAIRY-HERD IMPROVEMENT PROGRAM - STATE AND NATIONAL SUMMARY OF COW HERD AVERAGE RECORDS, 1978-79 [J]. SCIENCE AND EDUCATION ADMINISTRATION PUBLICATIONS, 1979, 55 (02): : 1 - 27
- [5] ECONOMIC VALUE OF DAIRY-HERD IMPROVEMENT PROGRAMS [J]. JOURNAL OF DAIRY SCIENCE, 1974, 57 (11) : 1420 - 1422
- [6] CALF MORTALITY IN DAIRY-HERD IMPROVEMENT HERDS [J]. JOURNAL OF DAIRY SCIENCE, 1975, 58 (05) : 761 - 761
- [10] ANTHRAX IN DAIRY-HERD [J]. JOURNAL OF THE SOUTH AFRICAN VETERINARY ASSOCIATION-TYDSKRIF VAN DIE SUID-AFRIKAANSE VETERINERE VERENIGING, 1977, 48 (04): : 293 - 295