,  (2011). An Investigation into the Textbooks of Primary Schools Studied in Iran in the Academic Year 1387 – 88 in Terms of the Degree of Consistency in Attaching/ Detaching of Free or Bound Morphemes to/ from a Stem or Each Other . *Pazhūhish-i Źabān  va Adabiyyāt-i Farsī*, 9(21), 1-10.