Hours of Work By Northrup, Herbert R., Dankert, Clyde Edward (EDT), and Mann, Floyd Christopher Books / Hardcover Business & Economics ISBN: 0313209030 / Publisher: Greenwood Pub Group, December 1979 Price $19.95 Free Shipping Send to a friend Used - Good Good condition. No Dust Jacket A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. $19.95 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.