TWICHELL, M. (1978). Wood energy: A practical guide to heating with wood. Garden Way Pub.
Dyfyniad Arddull ChicagoTWICHELL, Mary. Wood Energy: A Practical Guide to Heating with Wood. Charlotte: Garden Way Pub, 1978.
Dyfyniad MLATWICHELL, Mary. Wood Energy: A Practical Guide to Heating with Wood. Garden Way Pub, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.