@article{59593,
      note = {"Upper mantle scientific report no. 41, reprinted from  Tectonophysics, v. 13."},
      author = {Ritsema, A. Reinier},
      url = {http://library.usi.edu/record/59593},
      title = {The Upper mantle.},
      publisher = {Elsevier Pub. Co.,},
      recid = {59593},
      pages = {xii, 644 p.},
      address = {Amsterdam,},
      year = {1972},
}