00425nam a2200145Ia 4500008004100000020001500041082001700056100001900073245007100092260004500163300000800208650002300216650001800239653002200257170901s1997    xx            000 0 und d  a817319114X  a589.46bR13C  aRai, Ashwani K 0aCyanobacterial Nitrogen Metabolism and Environmental Biotechnology  aNew DelhibNarosa Publishing Housec1997  a299  aBotanical sciences  aPure Sciences  aAlgae, Blue green