Teachers, tangibles, techniques : Comprehension of content in reading - Smith Schulwitz, Bonnie; Wright, Marian A.; Mueller, Ruth G.; Dahl, Patricia; Willmon, Betty; Peltz, Fillmore K.; Franklin, Perry L.; Froese, Victor; Dramer, Dan; Murray, Donald M.; Charry, Lawrence B.; Harker, W. John; et al. (IRA, 1975)