TY - JOUR JF - ijpcp JO - IJPCP VL - 9 IS - 2 PY - 2003 Y1 - 2003/11/01 TI - Letter to the Editor TT - نامه به سردبیر N2 - Letter to the Editor SP - 100 EP - 102 AD - UR - http://ijpcp.iums.ac.ir/article-1-196-en.html ER -