TY - BOOK AU - Akitsu H AU - Kawarasaki M AU - Kikuchi S AU - Takaya N TI - Softness value of composite floors with sound-insulation performance against impact using plywood piece and wood-rubber chip mat PY - 2000/// PB - Journal of the Hokkaido Forest Products Research Institute (Japan) N1 - AGRIS CD 1999-2002/06 ER -