Wahl, E. F. (1977). Geometrical energy utilization. John - Wiley.
Chicago Edition CitationWahl, Edward F. Geometrical Energy Utilization. New York: John - Wiley, 1977.
Cita MLAWahl, Edward F. Geometrical Energy Utilization. John - Wiley, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.