Fertilizer production in six selected countries with good natural gas resources. New York: United Nations, 1969 VIII, 68 p. : ill.
Fertilizer production in six selected countries with good natural gas resources. New York: United Nations, 1969 VIII, 68 p. : ill.
(1969) Fertilizer production in six selected countries with good natural gas resources, New York: United Nations VIII, 68 p. : ill.
(1969). Fertilizer production in six selected countries with good natural gas resources. Report of the meeting of the ad hoc expert group of United Nations Headquarters, New York 9-16 December 1966. New York: United Nations, VIII, 68 p. : ill.
Fertilizer production in six selected countries with good natural gas resources: Report of the meeting of the ad hoc expert group of United Nations Headquarters, New York 9-16 December 1966. New York: United Nations; 1969. p. VIII, 68 p. : ill.
