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Welcome What are primary sources? Primary sources provide firsthand testimony or direct evidence concerning a topic or question under investigation They are

JSTOR is a digital library of academic journals, books, and primary sources  Aims & Scope Journal of Power Sources is the journal for researchers and technologists interested in all aspects of the science, technology and applications

ดูบุพเพสันนิวาส Fossil fuels are the dirtiest and most dangerous energy sources, while nuclear and modern renewable energy sources are vastly safer and cleaner  Protein foods Some food sources of dietary protein include: lean meats – beef, lamb, veal, pork, kangaroo; poultry