Singh, R. K. creator text New Delhi Random Pub 2015 monographic 286p. ; Petroleum chemicals Manufacturing processes Petroleum chemicals industry 661.804SIN 9789351116714 https://books.google.com.pk/books?id=O6sCkAEACAAJ&dq=petrochemical+production+process+singh&hl=en&sa=X&redir_esc=y https://books.google.com.pk/books?id=O6sCkAEACAAJ&dq=petrochemical+production+process+singh&hl=en&sa=X&redir_esc=y