00282nam a2200097Ia 4500008004100000082000700041100002100048245005200069260004700121300001600168260327b        |||||||| |||| 00| 0 eng d  aSF  aBriggs, F. E. A.  aOn problems of estimation in leontief modelsb/  aCambridge:bUniversity of Cambridge,c1957  a444p.-455p.