Special regulations SR (series). 742-507-50. Inspection of supplies and equipment: Serviceability standard for persistent agents, mustard H; mustard. H (German); mustard, distilled, HD: nitrogen, mustard, HN-1; mustard-T mixture, HT; mustard-T mixture, HT; (British); and lewisite, L, Changes 1; Nov. 10, 1952.

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