00367nam a2200145Ia 4500008004100000082001800041100001900059245002900078260003400107300000800141650001800149650002400167653001600191653001400207170901s1930    xx            000 0 und d  a595.789bW52M  aWilliams, C.B. 0aMigration of Butterflies  aLondonbOliver and Boydc1930  a473  aPure Sciences  aZoological sciences  aButterflies  aMigration