著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Selner, Gary I. and Hoffman, J. D.","E2MCOD: a program to determine and list Digital Line Graph (DLG) line attributes from a CD-ROM titled 1:2,000,000-Scale Digital Line Graph (DLG) and E2MGSM: a program to retrieve DLG line data from a CD-ROM titled 1:2,000,000-Scale Digital Line Graph and convert those data to a GSMAP database",,"U.S. Dept. of the Interior, Geological Survey",1991,Open-file report,,,,https://cir.nii.ac.jp/crid/1130000797322204672