OLIVEIRA, H. C. R.; OLIVEIRA, Helder Claudio Rique de. (BrasilCentro de Ciências e Tecnologia - CCTUFCGUniversidade Federal de Campina Grande, 1990)
Lea ther is noble raw material that throughout ist long tradition
dated from the origin of the human race who started from handcraft
works and has been improvin its use progressively,
Its confort, friction drag, ...