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Rous, B.; McCormick, K.; Gooden, C.; Townley, K. F. . (2007). Kentucky's Early Childhood Continuous Assessment and Accountability System: Local Decisions and State Supports. Topics in Early Childhood Special Education, 27(1), 19–33. doi:10.1177/02711214070270010201 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research