Ontario Teachers' Manuals - order 4 books

Ontario Teachers' Manuals - nice collection of 4 books

Nature Study - 1930
Arithmetic - 1929
Elementary Agriculture order and Horticulture - 1928
The New Educational Music Course - 1907

All in good condition. Wear to exterior commensurate with age......
Some writing/notes in front and back pages.
No rips, tears or significant creasing.