Mathematics TodayJanet S. Abbott, David W. Wells, Doug Brumbaugh · First published 1985 · Latest edition 1987Open the Tome
Trouble shooting mathematics skillsAllen L. Bernstein, David W. Wells · First published 1963Open the Tome
A selection of stereoscopic charts, compiled by ...David W. Wells · First published 1912Open the Tome
Stereoscopic treatment of heterophobia and heterotropiaDavid W. Wells · First published 1912Open the Tome
Stereoscopic treatment of heterophoria and heterotropiaDavid W. Wells · First published 1912Open the Tome