Ahmed, S Shakeel, Mohammed Yaqub, Khalil Ahmed, and G H Shaikh. “ULTRASONIC PROPAGATION IN AQUEOUS SOLUTION OF POLYVINYL ACETATE IN VARIOUS CONCENTRATIONS AT DIFFER- ENT TEMPERATURES: Short Communication”. Biological Sciences - PJSIR 47, no. 4 (August 30, 2004): 272–274. Accessed July 3, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/1534.