Lalo Guerrero with Mark & the Escorts

The label says "con el Conjunto de Mark Guerrero"
but it was in fact Mark & the Escorts
Mark Guerrero on bass on the "B" side
with a Mexican band

"Los Greņudos" b/w "Seņora Gonzalez"
Colonial Records (517)
45 rpm 7" single
Recorded at Jimmy Jones Studio, Pasdena, California
Released 1965

Songwriter: "Los Greņudos" (Lalo Guerrero)
Songwriter: "Seņora Gonzalez" (Lalo Guerrero)

Lalo Guerrero: lead vocal
Mark Guerrero: lead guitar
Robert Warren: rhythm guitar
Trini Basulto: tenor sax
Richard Magaņa: baritone sax
Joe Cabral: farfisa organ
Richard Rosas: bass
Ernie Hernandez: drums
Produced by Manuel Acuņa
Engineer: Jimmy Jones