THE TEXT BOOK OF CHEMISTRY FOR GRADE 9 - "MR HANIF DURRANI, MR TANVEER AHMED KHAN, MS PARVEEN ARARIN, PROF SHAFQAT ALI, MR VISHAL SHARMA, MR GHULAM QADIR, MR NAZIM AHMED, ME QWAIS ANWER" (SINDH TEXT BOOK BOARD PAKISTAN, 2021)