...preparing study specimens of. (National Museum bulletin 39, pt. N) paper 5c MAPS : Topographic maps — The Geological Survey is making a topographic map of the United States ; about one-third of the area of the country has been mapped. These maps are sold by the Director of...

...Siebenthal. 1910. [1] +587-643 p. 11. [From Mineral resources, 1908.] t Topographic sheets NOTE.— The Geological Survey Is making a topographic map of the United States. The sheets of which It Is composed are projected without reference to political divisions, and are...

...illus. 151 maps, 4° (Geological Professional paper 60.) Paper $2.75. 119.16:60 Topographic atlas. The Geological Survey is making a topographic map of the United States. The sheets of which it is composed are projected without reference to political divisions, and are...

...Vclhagen, 1886. MAPS 156. US Geological survey. Topographic sheets. Washington, US Geological survey. "The Geological survey is making a topographic map of the United States. The sheets of which it is composed are projected without reference to political divisions, and are...

...not show the vacant public land. 25 cents each by states. US Geological Survey. Topographic sheets. The geological survey is making a topographic map of the United States. More than two fifths of the country excluding outlying possessions has been mapped, every state being...

...221 New publications, list 150; Aug. 1, 1920. [1920.] 2 p. [Monthly.] t Topographic sheets NOTE. — The Geological Survey Is making a topographic map of the United States. The sheets of which it is composed are projected without reference to political divisions, • nil...