Nair,S K
Biofertilizers:concepts and prospects - Thrissur KAU 2000 - 172p.
Azotobacter
biofertilizers
631.847 / IR/DOE
Biofertilizers:concepts and prospects - Thrissur KAU 2000 - 172p.
Azotobacter
biofertilizers
631.847 / IR/DOE