Teaching the essentials of arithmetic /
Ballard, Philip Boswood
Teaching the essentials of arithmetic / Philip Boswood Ballard - 1st cheap ed. - London : Univ. of London Press, 1928 [Reprinted 1952]. - xxiv, 260 p. : ill. ; 18 cm.
Include Index.
Arithmetic
513 / BAT 1952
Teaching the essentials of arithmetic / Philip Boswood Ballard - 1st cheap ed. - London : Univ. of London Press, 1928 [Reprinted 1952]. - xxiv, 260 p. : ill. ; 18 cm.
Include Index.
Arithmetic
513 / BAT 1952