Secondary sources are studies by other researchers.
They describe, analyze, and/or evaluate information found in primary sources.
Questia offers quality sources selected by librarians and approved by professors, and many of the resources are peer-reviewed!
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all civil engineering disciplines including structural engineering, geotechnical engineering, transportation engineering, construction engineering, environmental engineering, engineering mechanics, sustainability, water resources, irrigation.
hydraulics, hydrology, waterways, urban planning, cold regions ...
A full-text aggregation of more than 180 scientific journals publishing current research in Biodiversity Conservation, Biology, Ecology, Environmental Science, Entomology, Ornithology, Plant Science, and Zoology.
Scientific journal database contains currently over 2,500 journals from all over the world, including 700 journals from Poland.
By repackaging information, secondary sources make information more accessible.
A few examples of secondary sources are books, journal and magazine articles, encyclopedias, dictionaries, handbooks, periodical indexes, and reviews, etc. These sources represent original thinking, report on discoveries, or share new information.