Chicago Millwork Supply Co.: Price Book and Specifications for Lumber and Millwork, Chicago. Gillette: Handbook of Cost Data, Myron C. Clark Co., New York.

Gordon-Van Tine Co. : Price Book and Specifications for Lumber and Mill-work, Davenport, Iowa. Griffith: Essentials of Woodworking, Manual Arts Press, Peoria, 111. Hodgson: Modern Carpentry, Frederick J. Drake Co., Chicago. Hodgson: Practical Uses of the Steel Square, Frederick J. Drake Co-., Chicago.

KIDder: Architects' and Builders' Pocket Book, John Wiley and Sons, New York.

Kidder: Building, Construction and Superintendence, Wm. T. Comstock, New York.

Radford: Cyclopedia of Building Construction, Radford Architectural Co., Chicago.

Radford: Details of Building Construction, Radford Architectural Co., Chicago.

The National Hardwood Lumber Association: Rides for Measurement and Inspection of Hardwood Lumber, McCormick Bldg., Chicago.