@manual{76267,
  author = {G. Sakellarides},
  title = {Atmospheric effective angular momentum functions for 1986-1987},
  year = {1989},
  number = {62},
  pages = {33},
  month = {02/1989},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}