Sheet 39I : Sheet H-42E Dera Ismail Khan AMS U501 Edition AMS 1 1949. Second SI Edition, 1932–AMS 1, 1949. South Waziristan boundary and district boundary along Indus River approximate. Grid added AMS 1949. AMS #136475, 1949. Printed 1-49. India Zone 1 Grid overprint.