Hassan, Mohamed El-Sayed. <br/><br/>
Studies on nitrogen-fixing blue-green algae in Egyptian soils  [microform]/ 
 دراسات على الطحالب الخضراء المزرقة المثبتة لأزوت الهواء الجوى فى الاراضى المصرية. 
Mohamed El-Sayed Hassan. 
 -  1978. 
 - 239, 8 leaves :  ill. ;  30 cm. 
<br/><br/>Thesis (Ph.D.) -- Ain Shams University, 1978. 
<br/><br/>Includes bibliographical reference (leaves [211]-239) 
<br/><br/><br/>Microfiche. <br/>Cairo, Egypt : <br/>ASUNET, <br/>5 microfiche : negative. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cyanobacteria--Egypt.<br/>Nitrogen-fixing algae.<br/>Soils.