Descripción
Sumario:Annotation
Notas:"ECE/TIM/SP/34."
"United Nations publication Sales No. E.14. II.2"--Page 4 of cover
Descripción Física:1 online resource (v, 83 pages) : color illustrations
Bibliografía:Includes bibliographical references (pages 45-50).
ISBN:9789210564519
9210564510
9211170710
9789211170719
ISSN:1020-2269 ;