AHMAD, IMTIAZ, F.H. SHAH, and M. ZAFAR IQBAL. 1994. “?NITRATE AND NITRITE CONTENTS IN FOOD OF PLANT ORIGIN IN PAKISTAN ?”. Biological Sciences - PJSIR 37 (1-2):47-50. https://v2.pjsir.org/index.php/biological-sciences/article/view/2573.