%0 U.S. Federal Government Document %0 Book %0 E-Resource %A Long, Larry H. %E United States. Bureau of the Census %I U.S. Dept. of Commerce, Bureau of the Census : For sale by the Supt. of Docs., U.S. Govt. Print. Off. %D 1978 %G English %B Current population reports : Special studies : Series P-23 ; no. 73 %B United States Bureau of the Census Current population reports : Special studies : Series P-23 %T Interregional migration of the poor : some recent changes