[1] .1989 .Occupatioannd thesquamouscellcancersof thepharynxand sinunasaclavity. Am J Ind Med, 16 : 493-510.
[2] .1989 .A casecontrosltudyof tobaccorelatecdancersin ColumbiaB. ullPanAmHealth Organ, 23 : 405-13.
[3] Malik IA,Khan WA,Khan ZK . .Patternof malignant tumorsobservedin a universithyospitala:retrospec tiveanalysisJ. PakMedAssoc, 48 : 120-122.
[4] Ml Alam .1993 .. JCollPhysiciansSurgPakistan, 3 : 73-5.
[5] .1990 .Geographicdistributioonf cancerof thelarynxand hypopharynxby anatomic subsiteB. uttCancer, 77 : 137-46.
[6] .1987 .. Cancerof the head and neck. 3rded, 37 : 178-183.
[7] .1987 .. Treatment of hypopharyngeaclarcinomaa: 10-yearreviewof 1362 cases.Laryngoscope, 97 : 901-4.
[8] .1997 .. Shah JP. Hypopharyngeal cancerpatientcareevaluationLa.ryngoscope, 107 : 1005-17.
[9] Shah JP,Shaha AR,Spiro RH .1998 .Carcinomoaf hypopharynxa:nalysisof incidenceand surviva lin Sweden overa 30-yearperiod. , 132 : 439-43.
[10] .1976 .. Cancerof the hypopharynxa:n analysisof treatmenatnd resultins 162 patientsA.rch Otolaryngol, 102 : 716-21.
[11] .1995 .AssuitUniversityexperienceJ. Arch Otolaryngol Head Neck Surg, 109 : 737-40.