Board of Directors v. Iowa State Board of Public Instruction , 252 Iowa 237 ( 1960 )
Eden Township School District v. Carroll County Board of Education , 181 N.W.2d 158 ( 1970 )
Castana Com. Sch. Dist. v. STATE BOARD OF PUB. INSTR. , 155 N.W.2d 522 ( 1968 )