@article{868302,
      author = {Schweingruber, Fritz Hans. and Steiger, Peter. and  Börner, A.},
      url = {http://library.usi.edu/record/868302},
      title = {Bark Anatomy of Trees and Shrubs in the Temperate Northern  Hemisphere /},
      recid = {868302},
      pages = {1 online resource (399 pages)},
}