Riastuti, Rini, 		Muwahhid, Kautsar, 		Maksum, Ahmad, 		Soedarsono, Johny, AND 		Asfar, Mhd. Ibkar Yusran.
" STUDY OF INFLUENCE TIME IN THE IMPROVEMENT OF NICKEL CONTENTS ON LIMONITE PROCESSING USING NAOH" <em>ROTOR</em> [Online], Volume 15 Number 2 (9 November 2022)