00297nam a2200121Ia 4500008004100000082001300041100002500054245001300079250001200092260004800104300001000152650001300162140113s9999    xx            000 0 und d  a575.1 H8  a"Shull, Franklin A."  aHeredity  a4th Ed.  b"New York : McGraw-Hill book company, 1948"  a311p.  aHeredity