00851nam a2200265Ia 4500 117481 BIBL 20160527184515.0 760827s1941 enkab 000 0 eng 41005267 (OCoLC)02399698 DLC HEI m/c PUXA QA141 .T39 511.2 Terry, George S. (George Skelton) cn 283199 Local The dozen system an easier method of arithmetic [by] George S. Terry. [1st ed.] London New York Longmans Green 1941. 53 (i.e. 63) p. illus., map., tables. 29 cm. Reproduced from type-written copy. Paged by the dozen system. "Duodecimal protractor reading .002 circle" and table laid in. Numeration 143775 Local 98302 98302 0 0 0 511_200000000000000_T329 0 evl 58171 10 10 1 2016-05-27 178247 0 511.2 T329 80000001277584 2016-05-27 00:00:00 r:117481 z:NCC:D 6