The relevance and importance of Samuel P. Hay's book, Conservation and the Gospel of Efficiency, has only increased over time. Written almost half a century ago

The relevance and importance of Samuel P. Hay's book, "Conservation and the Gospel of Efficiency," has only increased over time. Written almost half a century a

2014 Reprint of 1959 Edition. Full facsimile of the original edition, not reproduced with Optical Recognition Software. The relevance and importance of Samuel P