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Search keyword：(Author: #Behr Merlyn J.)
Fundamentals of elementary mathematics : number systems and algebra / [by] Merlyn J. Behr [and] Dale G. Jungst
New York : Academic Press , 1971
Number concepts and operations in the middle grades / editors, James Hiebert, Merlyn Behr
: pbk,: cloth. - [Hillsdale, N.J.] : Lawrence Erlbaum Associates. - Reston, Va. : National Council of Teachers of Mathematics , c1988. - (Research agenda for mathematics education ; v. 2)