Number concepts and operations in the middle gradesJames Hiebert, Merlyn J. Behr · First published 1988Open the Tome
Number Concepts and Operations in the Middle Grades: the Research Agenda for Mathematics Education, Volume 2 (Research Agenda for Mathematics Education Series)Merlyn Behr, James Hiebert · First published 1988Open the Tome
Fundamentals of elementary mathematicsMerlyn J. Behr · First published 1971 · Latest edition 1972Open the Tome
