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http://reply.papertrans.cn/1/89/8878/8878-32.png
Submitted on: 26 March 2015.
Revised on: 23 May 2015.
Accepted on: 02 June 2015.
___________________Estudios Geograficos---CONSEJO SUPERIOR INVESTIGACIONES CIENTIFICAS-CSIC
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Submitted on: 05 February 1999.
Revised on: 03 March 1999.
Accepted on: 30 March 1999.
___________________Estudios Geograficos---CONSEJO SUPERIOR INVESTIGACIONES CIENTIFICAS-CSIC
Submitted on: 09 March 2014.
Revised on: 15 May 2014.
Accepted on: 13 July 2014.
___________________Estudios Geograficos---CONSEJO SUPERIOR INVESTIGACIONES CIENTIFICAS-CSIC