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APA Citation
Dai, J., Bean, B., Brown, B., Bruening, W., Edwards, J., Flowers, M., Karow, R., Lee, C., Morgan, G., Ottman, M., Ransom, J., & Wiersma, J. (n.d.). harvest index and straw yield of five classes of wheat. Biomass and bioenergy, 85, 223–227. http://access.bl.uk/ark:/81055/vdc_100070078147.0x000010