Social progress through community development.

Manylion Llyfryddiaeth
Awdur Corfforaethol:	United Nations. Secretary-General, 1953 - (Hammarskjold)
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	New York United Nations Bureau of Social Affairs 1955
Pynciau:	Social service, Rural.