Biswas, Dilip creator text New Delhi Excel Books 2004 monographic 414p. ; 628BIS http://books.google.com.pk/books?id=FRZyY3ha-H0C&pg=PR18&lpg=PR18&dq=environmental+management+by+biswas+dilip&source=bl&ots=jgB5rvUID5&sig=gjYAHzqkSrhJW-QT2ZXzf1prCLg&hl=en&sa=X&ei=Mqo8VJ3xMsHcapvigpgL&ved=0CDMQ6AEwBA#v=onepage&q=environmental%20management%20by%20biswas%20dilip&f=false http://books.google.com.pk/books?id=FRZyY3ha-H0C&pg=PR18&lpg=PR18&dq=environmental+management+by+biswas+dilip&source=bl&ots=jgB5rvUID5&sig=gjYAHzqkSrhJW-QT2ZXzf1prCLg&hl=en&sa=X&ei=Mqo8VJ3xMsHcapvigpgL&ved=0CDMQ6AEwBA#v=onepage&q=environmental%20management%20by%20biswas%20dilip&f=false