http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Engineering index annual (1968) 0360-8557
Engineering index monthly (1984) 0742-1974
Engineering index bioengineering abstracts 0736-6213
Engineering index energy abstracts 0093-8408
Energy research abstracts Feb. 1981- 0160-3604
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International journal of coal geology (Online)
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