000 00308 a2200109 4500
008 190207b xxu||||| |||| 00| 0
100 _aSingh,R.N
245 _aRole of blue-green algae in nitrogen economy of indian agriculture /
_cSingh,R.N
260 _aNew Delhi
_bICAR
_c1961
300 _a175p.
942 _2ddc
_cBK
999 _c7982
_d7982