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[ ] [LOCAL SECTION CODE (Numbers indicate Sections) No. Section LI Alaska L50 Adirondack L2 Arizona L58 Arkansas L84 Balcones L66 Billings Petr. L3 Black Hills L4 Boston L76 Caracas L5 Carlsbad Potash L6 Central Appal. L60 Central N. Mex. L7 Chicago L79 CIM-AIME Calgary L82 CIM-AIME Edmonton L8 Cleveland L9 Colorado]

Jan 1, 1961

[NUMERICAL CODE TO MAPS (Region Listed in Roman Numerals after Each Petroleum Section) 1 Alaska 2 Arizona 3 Black Hills 4 Boston 5 Carlsbad Potash 6 Central Appalachia 7 Chicago 8 Cleveland 9 Colorado 10 Columbia 11 Connecticut 12 Delta (VIII) 13 Detroit 14 East Texas (VI) 15 El Paso 16 Gulf Coast (VII) 17 Kansas (IX) 18 Lehigh Volley 19 Mid-Continent (IX) 20 Minnesota 21 Montana 22 Nevada 23 New York]

Jan 1, 1961

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