เพิ่มเมื่อ: 2018-02-06 23:40:04.0
 แก้ไขล่าสุด: 2019-07-12 17:16:15.0
		                        	The thorough reinvention of the 2B Theory Book offers eight superb new pages for in-depth study of chords, harmonization, and rhythm. New improvisation activities offer creative exploration of scales in C major, G major and F major.
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