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Submitted on: 29 June 2009.
Revised on: 22 October 2009.
Accepted on: 28 November 2009.
___________________Erwerbs-Obstbau---SPRINGER
Submitted on: 13 May 1999.
Revised on: 02 June 1999.
Accepted on: 23 July 1999.
___________________Erwerbs-Obstbau---SPRINGER
Submitted on: 16 May 2008.
Revised on: 21 August 2008.
Accepted on: 03 September 2008.
___________________Erwerbs-Obstbau---SPRINGER
Submitted on: 18 February 2011.
Revised on: 14 June 2011.
Accepted on: 07 July 2011.
___________________Erwerbs-Obstbau---SPRINGER