TY  - BOOK
AU  - Ebel,Karl-H.
ED  - International Labour Office.
TI  - Construction skills/ 
PY  - 1969///
CY  - Geneve : 
PB  - CIRF Publications, ILO, 
KW  - Building
KW  - Study and teaching
N1  -  Includes bibliographical references
ER  -