Richard L. Hills / Richard LHills
Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
The wind is a fickle source of power; with speeds frequently too low to be of sustained practical use, windpower has generally remained a marginal resource. Since the inception of windpower around AD 1000, technology has been deployed to obtain the most economical power possible form wind.