Piperno, D. R., Holst, I., Wessel-Beaver, L., & Andres, T. C. (2002). Evidence for the control of phytolith formation in Cucurbita fruits by the hard rind (Hr) genetic locus: Archaeological and ecological implications. National Academy of Sciences.
Dyfyniad Arddull ChicagoPiperno, Dolores R., Irene Holst, Linda Wessel-Beaver, and Thomas C. Andres. Evidence for the Control of Phytolith Formation in Cucurbita Fruits By the Hard Rind (Hr) Genetic Locus: Archaeological and Ecological Implications. National Academy of Sciences, 2002.
Dyfyniad MLAPiperno, Dolores R., Irene Holst, Linda Wessel-Beaver, and Thomas C. Andres. Evidence for the Control of Phytolith Formation in Cucurbita Fruits By the Hard Rind (Hr) Genetic Locus: Archaeological and Ecological Implications. National Academy of Sciences, 2002.