00386nam a2200169Ia 4500008004100000020001800041245001800059245001700077260001500094260002200109260000900131300001500140300002500155300001100180440001700191500000800208170705s9999    xx            000 0 und d  a9780531228012  aBlack holes /  cby Ker Than.  aNew York :  bChildren's Press,  c2010  a48 pages :  bcolor illustration ;  c21 cm.  aA true book.  a940