Tầm nguyên từ điển
Google Gadget - "Google Docs Viewer"
Lê Văn Hòe
Nguồn: http://www.tusachtiengviet.com/images/file/Ud5GUVss1AgQALos/tam-nguyen-tu-dien.pdf?fbclid=IwAR0BwiYtghHuJ88dbISHx8_viRe495Q0KE8Xd0JaahablwnU6pMzqe2WM24
Quốc Học Thư Xã, 1941
Nguồn: http://www.tusachtiengviet.com/images/file/Ud5GUVss1AgQALos/tam-nguyen-tu-dien.pdf?fbclid=IwAR0BwiYtghHuJ88dbISHx8_viRe495Q0KE8Xd0JaahablwnU6pMzqe2WM24
Google Gadget - "Steegle.com - Google Sites Like Button"