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1.
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The relationship between airborne particles size and site of desposition in the respiratory system [microform] / by Ahmed Fathi Hussien Ahmed Helal. by Language: English Summary language: Arabic
Publication details: 1978
Dissertation note: Thesis(M.S.)--AL-Azhar university, 1978.
Other title:
  • العلاقة بين حجم الجزيئات المحملة بالهواء ومكان احتجازها فى الجهاز التنفسى.
Availability: Items available for loan: Main (1)Call number: THESIS S-98.

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2.
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Quantitative chemical analysis of some toxic elements and their effects on human and animal [microform] / Ahmed Fathi Hussein Ahmed Helal. by Language: English Summary language: Arabic
Publication details: 1982
Dissertation note: Thesis (Ph.D.)--Al-Azhar University, 1982.
Other title:
  • التقدير الكيميائى الكمى لبعض العناصر الضارة واثرها فى الأنسان والحيوان.
Availability: Items available for loan: Main (1)Call number: THESIS S-114.

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3.
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Ecological and biological studies on the tomato pest Nesidiocoris tenuis Reut [microform]/ by Helal Ahmed Mohammed Helal. by Language: English Summary language: Arabic
Publication details: 1974
Dissertation note: Thesis (M.S.)--Al-Azhar University, 1974.
Other title:
  • دراسات بيئية و حيوية على آفة الطماطم Nesidiocoris Tenuis Reut.,التابعة لرتبة نصفية الأجنحة.
Availability: Items available for loan: Main (1)Call number: THESIS S-149.

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4.
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5.
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Preparation of some new formulations and their pesticidal activity [electronic resource] / Mohamed Helal Ahmed Ali El-Sawah by Language: English Summary language: Arabic
Publication details: 2019
Dissertation note: Thesis (Ph.D.) -- Al-Azhar University, 2019.
Other title:
  • تحضیر بعض مستحضرات المبیدات الجدیدة وفاعلیتھا ا لإبادیة للآفات
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6.
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Preparation of some new formulations and their pesticidal activity [electronic resource] / Mohamed Helal Ahmed Ali El-Sawah by Language: English Summary language: Arabic
Publication details: 2019
Dissertation note: Thesis (Ph.D.) -- Al-Azhar University, 2019.
Other title:
  • تحضیر بعض مستحضرات المبیدات الجدیدة وفاعلیتھا ا لإبادیة للآفات
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Availability: Items available for loan: Main (2)Call number: CD-5835, ...

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