Biblioteca UGB Search for 'an:1751 and itype:BK and su-to:MEDIO AMBIENTE and su-to:RECURSOS NATURALES'

Interpretación ambiental :

By Ham, Sam H. Colorado Fulcrum Golden 1992 . 437 p.

By Enkerlin Hoeflich, Ernesto. México Thomson Editores 1997 . 0 p. 9687529024

By Mitchell, Bruce. Madrid MP 1997 . 0 p. , Indice en pag.7-9 8471147890

El Salvador USAID 1998 . 74 p.

By Mendoza Orantes, Ricardo. El Salvador Juridica Salvadoreña 1999 . 59 p. , Indice.p.(57-59)