TY  - BOOK
AU  - Abdel-Wahab,Samira Mohamed
TI  - Genetic control of nitrogen fixation in Rhizobium Trifolii strains 
PY  - 1977///
KW  - Nitrogen
KW  -  Fixation
KW  - Rhizobium
N1  - Thesis (Ph.D.)--Cairo  University,1977; Includes bibliographical references (leaves 162-173); Microfiche; Cairo, Egypt; ASUNET; 4 microfiches:negative
ER  -