Basic Mathematics for Occupational and Vocational StudentsRichard C. Spangler · First published 2000Open the Tome
Mathematics for Technical and Vocational StudentsRichard C. Spangler, John Boyce · First published 1999Open the Tome
Math worktext for technical and vocational studentsSpangler, Richard C., Richard C. Spangler, John G. Boyce · First published 1997Open the Tome
Student solutions manual & study guide to accompany Intermediate algebraDennis Weltman, Gilbert Perez, Richard C. Spangler · First published 1994Open the Tome
