TY  - BOOK
ED  - Puerto Rico.
TI  - Manufactura de productos de concreto y piedra: Manufacture of concrete and stone products..
PY  - 0000///19-
CY  - [San Juan, P.R.]
PB  - División de Análisis de Salarios y Estudios Ocupacionales
KW  - Concrete products
KW  - Local
KW  - Stone industry and trade
KW  - Puerto Rico
N1  - With appedncies and explantory notes; Part of text in Egnlish
ER  -