00255nam a22001097a 4500003000400000008004100004082001400045100001700059245003500076260002600111300000800137OSt240702b        |||||||| |||| 00| 0 eng d  a587bS65M  aSperne, K.R.  aThe Morphology of Ptridaphytes  aBI, Publicationc1974  a192