Home / Architecture / Green Roof : Michael Van Valkenburgh Associates’ Design for the Headquarters of the American Society of Landscape Architects Green Roof : Michael Van Valkenburgh Associates’ Design for the Headquarters of the American Society of Landscape Architects Christian WerthmannNew York: Princeton Architectural Press, 2007.First Edition. . New Book. SOLD Add to WishlistOn your Wishlist - View List Add to Wishlist SKU: 0004236 Category: Architecture