In its preface Gillette ( 1904 ) gave an introduction of mineral production and rock excavation :
In line with this topic Gillette in 1904 published Rock excavation : methods and cost .
In Gillette 's preface Gillette ( 1904 ) gave an introduction of mineral production Rock excavation   excavation :
In line with this topic Gillette in 1904 published Rock excavation : methods and cost .