TY  - BOOK
AU  - Mahmoud,Taha Ahmed
TI  - Studies on nitrogen fixation by nitrogen fixing microorganisms 
PY  - 1981///
KW  - Nitrogen-fixing microorganisms
KW  - Microorganisms
N1  - Thesis (M.S.)--Mansoura University, 1981; Includes bibliographical reference (leaves 97-126); Microfiche; Cairo, Egypt; ASUNET; 3 microfiches : negative
ER  -