Your choice : Stamps by type -> Cover issued by WWF -> From 1976 till 1979

Country	Year	Description	Animal	Scott	Groth	Price in $US	.	.	.
ROMANIA - Cover issued by WWF	1977	3 WWF COVER - 2 WWF follower stamps on each cover	Franklin Mint Album	.	U1977R	4,7
ITALY - Cover issued by WWF	1978	WWF COVER - 4 stamps & 1 label on 1 cover - Seagull & WWF - 3 ship cancels - Addressed Registred	Il mare deve vivere	.	U1978	30,1