Specifications for the bituminous surface treatment of gravel and crushed stone surfaces, subclass A-1.

Mode of access: Internet.

Specifications for the bituminous surface treatment of gravel and crushed stone surfaces, subclass A-3 (Liquid and powdered asphalt) : effective May 15, 1939.

Mode of access: Internet.

Effect of phosphates on water treatment : phosphates in Illinois surface waters /

"Final report for the period June 15, 1955 to September 15, 1957 for American Association of Soap and Glycerine Producers."