2 maps on 2 sheets : col. ; 47 x 50 cm. and 71 x 71 cm., sheets 103 x 99 cm. and 99 x 104 cm. + 2 data sheets (84 x 84 cm. and 90 x 112 cm.) folded in envelope 31 x 24 cm.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.