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2017년 1월 7일 sysop 0

https://books.google.co.kr/books?id=Uo4sBgAAQBAJ&pg=PA220&lpg=PA220&dq=%EA%B0%80%EC%9A%B0%EC%8A%A4%EB%B0%A9%EB%B2%95&source=bl&ots=gEMv55t-6U&sig=bETT-I_FHVlDhE_tBvnY5x-wdEA&hl=ko&sa=X&ved=0ahUKEwiA34_msNXRAhUIW5QKHYfFBA0Q6AEIQjAF#v=onepage&q&f=true