TY  - RPRT
TI  - Geology and mineral resources of Paraguay--a reconnaissance, with sections on Igneous and metamorphic rocks and soils
AU  - E.B. Eckel
AU  - Charles Milton
AU  - P.T. Sulsona
PY  - 1959
DO  - 10.3133/pp327
UR  - https://pubs.usgs.gov/publication/pp327
ID  - pp327
ER  -