Ebbs, D., Flicop, S., Hidalgo, M. M., & Netten, A. (2023). Systems and instrument verification in PIRLS 2021. In M. von Davier, I. V. S. Mullis, B. Fishbein, & P. Foy (Eds.), Methods and Procedures: PIRLS 2021 Technical Report (pp. 5.1-5.24). Boston College, TIMSS & PIRLS
International Study Center. https://doi.org/10.6017/lse.tpisc.tr2103.kb2485
ISBN: 978-1-889938-68-4
Library of Congress Catalog Card Number: 2023902579
