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DTN CONTEND ot ue ~ ne ay assis tance you can renter in n this aatter will be ol) Qhere is attached a ph ere forwarded to the Iaboratory of this Bureaa Sor connection | with an h investigative wa ttere ar. ae BE: ED donestic and foreign bl BY nd deseription of these your factorye Otherwise, any. f CQXdistribution of those év3—s |aawaillable infor:ation wh nt be or assistance in identifying. J py| the manufacturer of these GP requested. | oO 33 _ B11 catalogs and available detailed technical descriptions | . ny N of your eduction would be of great assiatanoe as confidene ee Ee tal refer material in this Asboretory. ho net — od if ee "Flease consider this ‘Soquiry as ‘confidenttals Tt is: oe SE = desired that you retorn the attached rhotograph with your response. <x a os! parked for the attention of the Fei Taboratorye care _ greatly appreciated, -