000 00395nam a2200121Ia 4500
008 140208s9999 xx 000 0 und d
044 _aIndia
100 _aSingh, Mahender Nath
245 _aStudies on the variable efficiency of aphid vector in transmitting plant viruses
_cMahendra Nath Singh
260 _bHimachal Pradesh University
_aSimla
_c1977
300 _a37 p.; 29cm.
942 _2udc
_cTH
999 _c20649
_d20649