000 00232nam a2200085Ia 4500
008 180131b1961 xxu||||| |||| 00| 0 eng d
080 _a
_b
100 _a
245 _aEra-U/T145 - 1961; Theoretical Study Of Pip And Crater Shape
260 _a
_bERATechnology Ltd
_c1961
999 _c64429
_d64429