US Bureau Bulletins

[Assumptions]

Could someone let me know how one may obtain a copy of a bulletin of the US Bureau of Mines? I am looking for a copy of Bulletin # 503.
Thanks for your time.

 

[IRstuff]

http://www.ntis.gov/products/specialty/bom.asp?loc=4-5-1

TTFN

 

[Assumptions]

Thanks IRstuff. Greatly appreciated.