Submitted on: 12 February 2017.
Revised on: 10 April 2017.
Accepted on: 02 May 2017.
___________________ENVIRONMENT AND HISTORY---WHITE HORSE PRESS
http://reply.papertrans.cn/1/86/8553/8553-32.png
Submitted on: 30 December 2018.
Revised on: 10 April 2019.
Accepted on: 08 June 2019.
___________________ENVIRONMENT AND HISTORY---WHITE HORSE PRESS
http://reply.papertrans.cn/1/86/8553/8553-34.png
Submitted on: 06 July 2014.
Revised on: 28 July 2014.
Accepted on: 09 August 2014.
___________________ENVIRONMENT AND HISTORY---WHITE HORSE PRESS
http://reply.papertrans.cn/1/86/8553/8553-36.png