00293nam a2200109Ia 4500008004100000040001100041100002500052245003900077260004400116300001300160300001000173251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aFritiof S. Sjostrand 0aJournal of Ultrastructure Research  cOctober, 1971bAcademic PressaNew York  aP. 1-708  bV. 37