00394nam a2200145Ia 4500008004100000082001600041100001700057245007100074250000600145260002600151300000800177650002300185650001800208653002200226170901s1961    xx            000 0 und d  a589.8bS48R  aSingh, R. N. 0aRole of Blue Green Algae in Nitrogen Economy of Indian Agriculture  a1  aNew DelhibICARc1961  a175  aBotanical sciences  aPure Sciences  aAlgae, Blue green