Barthwal, R.R. creator text New Delhi New Age International 2012 2nd ed. monographic 412p. ; Environmental impact analysis 333.7BAR 9788122432275 https://books.google.com.pk/books?id=5lBTMVw7yU4C&dq=environmental+impact+assessment+by+barthwal&source=gbs_navlinks_s https://books.google.com.pk/books?id=5lBTMVw7yU4C&dq=environmental+impact+assessment+by+barthwal&source=gbs_navlinks_s