000
00261nam a2200109Ia 4500
008
220201s1960 xx 000 0 eng d
100
_a
Dehn,Edgar
245
0
_a
Algebra equation
260
_b
Newyork:Doner publication inc.
_c
1960
300
_a
208
942
_2
ddc
999
_c
71841
_d
71841