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Many students have had trouble doing this assignment in the past because they felt the article had to match their topic exactly. It does not, and in some cases it probably won't.
If your topic is 5G communication in police patrol cars, you probably will not find an article that addresses exactly that subject. However, you know that 5G technology deals with wireless communication. So, you'd look up the history of wireless technology and by combining what you learn, you'll be able to make the point that 5G communication will allow for more private communication between patrol cars and police department headquarters. Be creative!
Reading the entry for "protective clothing (Watkins, 2005)" led to ideas for more title to search in the catalog. Using this information and the bibliography I was able to find the article by Schram, et al. (2018) that had what appeared to me to be very useful information. Using these headings, I was also able to find a good government publication (U.S. DOJ, 2009).
Schram, B., Orr, R., Pope, R., Hinton, B., & Norris, G. (2018). Comparing the effects of different body armor systems on the occupational performance of police officers. Internatioal Journa of Environmental Research and Public Health, 15(5). https://doi.org/10.3390/ijerph15050893 [https://www.mdpi.com/1660-4601/15/5/893/pdf]
United States Department of Justice (2009). Ballistic resistance of body armor. Nova Science Publishers, Inc.
Watkins, S. M. (2005). Protective clothing. In V. Steele (Ed.), Encyclopedia of clothing and fashion (Vol. 3, pp. 58-60). Detroit, MI: Charles Scribner's Sons. Retrieved from Gale eBooks Database.