mărci poștale Mediu turkey 1980

and or

1980-06-04

Mediu

Mi#	2513
LC#	2907

Clean and Polluted Environment

Mi#	2514
LC#	2908

Water Pollution from Chemical Waste Water

Mi#	2515
LC#	2909

Air Pollution from Industrial Waste Gases

Mi#	2516
LC#	2910

Soil Contamination by Oil

* LC# - Isfila - İstanbul Filateli ve Kültür Merkezi Türk Pulları Kataloğu
Mi# - MICHEL Briefmarken Kataloge
Sc# - Scott Postage Stamp Catalog

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