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Submitted on: 28 July 2000.
Revised on: 02 October 2000.
Accepted on: 20 October 2000.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
Submitted on: 03 October 2017.
Revised on: 16 January 2018.
Accepted on: 20 February 2018.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
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Submitted on: 05 January 2004.
Revised on: 16 March 2004.
Accepted on: 02 April 2004.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
Submitted on: 18 January 2021.
Revised on: 15 April 2021.
Accepted on: 08 May 2021.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
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Submitted on: 24 September 2008.
Revised on: 15 January 2009.
Accepted on: 01 March 2009.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS