000 00324nam a2200121Ia 4500
008 170101s1998 xx 000 0 und d
082 _a561.5 BEC
100 _aBeck, C.B
245 0 _aOrigin and evolution of gymnosperms
260 _aDehradun
_bBishen Singh Mohandra pal singh
_c1998
300 _a504p.
942 _2ddc
_cBK
999 _c314931
_d314931