Introductory mining engineering / Вводные сведения по горному делу

It is not a frequent experience for a write r to receive the opportunity to revise ami update a previous work. Such is the case, however, with this revised second bilition of Introductory Mining Engineering, originally authored by Howar d L. Hurt man. Further , the planned revision took an unexpected turn when Jan M . Millmansky joined the undertaking as coauthor of the second edition. I n fact, I )i Mutmansky contributed to the original work , serving as a reviewer of the  (tillino, as reader, and as critic. He was acknowledged in the preface of the first ilit ion and thus was the logical choice as coauthor of the second edition. <...>