RT Book
T1 Photoshop's layers 
A1 Koslowski, Matt
LA ItalianoPB Pearson
YR 2008
PP Milano}
OP 255 p.  : ill. ; 24 cmSN 9788871925356K1 Grafica -- Programmi per microelaboratori
K1 Microelaboratori elettronici -- Programmi Adobe Photoshop