Classification de le Journal of Economic Literature (JEL)
Clasificación del Journal of Economic Literature (JEL)
Journal of Economic Literature Classification Scheme (JEL)
Klassifikation des Journal of Economic Literature (JEL)
Alternative Energy Sources
Alternative Energiequellen
Fuentes de energía alternativa
Énergies de substitution
Q42 - Fuentes de energía alternativa
Q42 - Énergies de substitution
Q42 - Alternative Energiequellen
Q42 - Alternative Energy Sources
JEL
JEL classification
JEL Klassifikation