Não informado. (1977). Fueloil and oil heat and solar systems. Industry Publications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Fueloil and Oil Heat and Solar Systems. Cedar Grove, NJ: Industry Publications, 1977.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Fueloil and Oil Heat and Solar Systems. Industry Publications, 1977.
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