Out, W. A. (2009). Sowing the seed?: Human impact and plant subsistence in Dutch wetlands during the late Mesolithic and early and middle Neolithic (5500-3400 cal BC). Leiden University Press.

Out, Welmoed Aave. Sowing the Seed?: Human Impact and Plant Subsistence in Dutch Wetlands During the Late Mesolithic and Early and Middle Neolithic (5500-3400 Cal BC). Leiden: Leiden University Press, 2009.

Out, Welmoed Aave. Sowing the Seed?: Human Impact and Plant Subsistence in Dutch Wetlands During the Late Mesolithic and Early and Middle Neolithic (5500-3400 Cal BC). Leiden University Press, 2009.