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, it offers an invaluable history of the... This description may be from another edition of this product.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.