=LDR 22 4500 =001 5211 =082 04$a526.022 MAS =100 1\$aMassum, Bryan H. =245 10$aThe spatial structure of administrative systems =260 \\$bAssociation of American Geographers,$c1972 =650 \0$aPamphlets =852 \\$bFreeman Library$h526.022 MAS