Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Ken Lane's book "The Economic Definition of Ore" is a standard reference work within the mining industry. Elaborating on his theory originally developed in 1964, this book provides a thorough and comprehensive description of both the theory and practice of implementing cut-off grades within a mining operation.