Submitted on: 29 June 2002.
Revised on: 25 September 2002.
Accepted on: 15 November 2002.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
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Submitted on: 28 January 2021.
Revised on: 22 March 2021.
Accepted on: 14 May 2021.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
Submitted on: 22 June 2009.
Revised on: 13 August 2009.
Accepted on: 14 September 2009.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
Submitted on: 21 January 2014.
Revised on: 24 April 2014.
Accepted on: 22 June 2014.
___________________JOURNAL OF DAIRY RESEARCH---CAMBRIDGE UNIV PRESS
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