BrickLink - Set 990-1 : LEGO Trees and Signs (1970 Version) [Universal Building Set:Supplemental] - BrickLink Reference Catalog
LEGO 990-1 Trees and Signs (1971 Version with Granulated Trees and 4 Bricks) Set Parts Inventory and Instructions - LEGO Reference Guide
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LEGO 990-1 Trees and Signs (1971 Version with Granulated Trees and 4 Bricks) Set Parts Inventory and Instructions - LEGO Reference Guide
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LEGO 990-1 Trees and Signs (1971 Version with Granulated Trees and 4 Bricks) Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO Set 990-1 Trees and Signs (1971 version with granulated trees and 4 bricks) (1971 Universal Building Set > Supplemental) | Rebrickable - Build with LEGO
BrickLink - Set 990-1 : LEGO Trees and Signs (1970 Version) [Universal Building Set:Supplemental] - BrickLink Reference Catalog