medium octavo 中型八开本
O octavo 八开本
royal octavo 八开纸
large octavo 大八开本
short slip octavo 横八开本
quadragesimo-octavo 四十八开本
N a book size resulting from folding a sheet of paper of a specified size to form eight leaves 八开本 (Also called eightvoOften written 8vo, 8°)
demi-octavo
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