TY  - BOOK
AU  - "Stelly, Matthias."
TI  - Biological Nitrogen fixation in forage-Livestock systems
U1  - "631.461.5:633.2+636"":1975""(082.2)   L6" 
PY  - 0000///Medison
CY  - 1978
PB  - American Soc. of Agronomy
ER  -