TY  - BOOK
AU  - Hansen,Wallace R.
TI  - Suggestions to authors of the reports of the United States Geological Survey
SN  - no
PY  - 1991///
CY  - Washington - EEUU
PB  - U.S.Government Printing Office
KW  - Instrucciones para autores de Reports of the U.S.Geological Survey
KW  - Geologia
ER  -