Sheet 15E : Sheet J-39F&K-39X Belek GSGS 3919 First Edition 1942, reprinted 1951. Compiled and published originally SGI 1918 and revised to 1940. Published WO 1942. Heliographed OSO 1942. Unique No. 13674. Reprinted MELF January 1951. 3000/1/51. Grid C.