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+====== Scholarly Search Engines ======
+Academic search engines
+===== Bielefeld Academic Search Engine =====
+https://www.base-search.net/
+===== CORE =====
+https://core.ac.uk/
+===== Semantic Scholar =====
+https://www.semanticscholar.org/
+===== Baidu Scholar =====
+===== Science.gov =====
+Science.gov
+===== Google Scholar =====
+===== Microsoft Academic =====
+===== WorldWideScience =====
+https://worldwidescience.org/
+===== Wolfram Alpha =====
+http://www.wolframalpha.com/ \\
+“computational knowledge engine”
+===== Refseek =====
+http://www.refseek.com/
+=====Educational Resources Information Center =====
+Educational Resources Information Center (ERIC)
+https://eric.ed.gov/
+===== Virtual Learning Resources Center (VLRC) =====