@book{44783,
	author = {Nicholas A. Bowman, Stephanie Preschel & Danielle Martinez},
	title = { Does Supplemental Instruction Improve Grades and Retention? A Propensity Score Analysis Approach},
	publisher = {:Taylor and Francis Group and Routledge},
	year = {,March 2023},
	series = {The Journal of Experimental Education, Volume 91,2023 number 2},
	address = {USA},
	url = { https://www.tandfonline.com/doi/epdf/10.1080/00220973.2021.1891010?needAccess=true}
}