The effect of lactation number, stage, length, and milking frequency on milk yield in Korean Holstein dairy cows using automatic milking system by Mayakrishnan Vijayakumar, Ji Hoo Park, Kwang Seok Ki, Dong Hyun Lim, Sang Bum Kim, Seong Min Park, Ha Yeon Jeong, Beom Young Park, Tae Il Kim

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