LIBROS DEL AUTOR: barry campbell

2 resultados para LIBROS DEL AUTOR: barry campbell

barry campbell Eliminar filtro Quitar filtros
  • Solar Activity and Earth’s Atmosphere, a Re-evaluation
    Barry Campbell
    The Sun experiences 22 year cycles where its magnetic poles reverse every 11 years giving rise to sunspots.In 1801 William Herschel suggested the price of wheat in London was indirectly controlled by sunspots based on his personal observations that less rain fell when there were few spots. Seasonal flooding of Lake Chad followed an 11-year cycle that influenced rain in the catc...
    Disponible

    42,89 €

  • Practice Tests for IGCSE English as a Second Language
    Barbara Campbell / Marian Barry / Sue Daish
    ...
    Disponible

    37,08 €