#i know i post a lot of these but the more the merrier

thearialligraphyproject:

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• bookboon // for accounting, business, economics & finance, engineering, IT & programming, languages, marketing & law, natural sciences, statistics & mathematics (+ career & study advice, strategy & management)

• booksee // for arts & photography, biographies & memoirs, business & investing, computers & internet, cooking, entertainment, health, history, home, law, literature & fiction, medicine, references, religion, science, sports, travel, and other categories

• bookstacks // for popular classics

• boundless // for accounting, algebra, art history, biology, business, calculus, chemistry, communications, computer science, economics, education, finance, management, marketing, microbiology, music, physics, physiology, political science, psychology, sociology, statistics, U.S. history, world history, writing

• california learning resource network // for mathematics, science, history

• ck-12 // for elementary math, arithmetic, measurement, algebra, geometry, probability, statistics, trigonometry, analysis, calculus, earth science, life science, physical science, biology, chemistry, physics, sat exam prep, engineering, technology, astronomy, english, history

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