GIMBA , M. M.; EDOMWONYI-OTU, L. C.; YUSUF, N.; ABUBAKAR, A. Drag Reduction with Polymer Mixtures in Pipes of Different Diameters. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, v. 15, n. 3, p. 792-801, 2 Sep. 2019.