00323nam a2200121Ia 4500008004100000082001300041100001700054245005000071260003400121300001000155600001800165600001800183140113s9999    xx            000 0 und d  a581(07)   a" Mason, J."  aRural science: nature study and plant biology  b"Mdougall,s educational co, "  a176p.  a" Dow, J. A."  a" Dow, J. A."