References
Engineering index annual (1968), 0360-8557Engineering index monthly (1984), 0742-1974Engineering index bioengineering abstracts, 0736-6213Engineering index energy abstracts, 0093-8408Coal abstracts, 0309-4979Art and archaeology technical abstracts, 0004-2994Metals abstracts, 0026-0924World aluminum abstracts, 0002-6697Chemical abstracts, 0009-2258