00400cam a2200169 i 4500001000800000005001700008008004100025010001700066040001800083041000800101080001200109082001200121100000700133101000800140245005200148504003000200362390720171215072655.0740917s1975    nyuaf    b    001 0 eng    a   74020790   aDLCcDLCdDLC  aeng  a520 ABE00a520 ABE1 a42  aAST10aExploration of the universe /cGeorge O. Abell.  aBibliography: p. 669-671.