000			00639pam a2200157a 44500
082			_a511.1 _bK696n
100			_aKlose, Orval M.
245	1		_aTHE NUMBER SYSTEMS AND OPERATIONS OF ARITHMETICS _cAN EXPLANATION OF THE FUNDAMENTAL PRINCIPLES OF MATHEMATICS WHICH UNDERLIE THE UNDERSTANDING AND USE OF ARITHMETIC, DESIGNED FOR IN-SERVICE TRAINING OF ELEMENTARY SCHOOL TEACHERS AND PRE-SERVICE
250			_a1st
260			_aNew York _bPergamon Press _cc1966
300			_a265
440			_aThe Commonwealth And International Library. Mathematics Division _v
650			_aArithmetic -- Foundations
964			_gCIRC
997			_a77075 C
999			_c409518 _d409518