Your choice : Stamps by type -> WWF Cancel

Country	Year	Description	Animal	Scott	Groth	Price in $US	.	.	.
SOVJET UNION - USSR - WWF Cancel	1989	WWF Cancel	.	.	U1989R	6,1
SOVJET UNION - USSR - WWF Cancel	1989	WWF Cancel	.	.	U1989R	4,7