1 Piano,4 Hands,Piano Duet - Level 4 - Digital Download SKU: A0.1422874 Composed by F. p. Cardoso. Arranged by Michael James REGAN. Folk,Latin,Multicultural,Traditional,World. Score. 8 pages. Michael Regan #1004230. Published by Michael Regan (A0.1422874). El Tren Lechero (the Milk Train) is a Paraguayan Polka that attempts to imitate the sounds of a train moving off slowly, gathering speed and coming to a halt.