Earth science field trip, guide leaflet : Metropolis area : Massac, Pope and Johnson Counties : Paducah, Brownfield, Vienna and La Center Quadrangles.

"April 11, 1959."

Earth science, a physiography,

"Helpful reference books": p. 570-574.

Earth science information network : relationship of consortium to federal agencies : report to the Chairman, Committee on Science, House of Representatives /

"B-259468"--P. 1.