@article {711,
	title = {The effects of different ozone exposures on three contrasting populations of Plantago major L. },
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	volume = {132},
	year = {1996},
	pages = {493-502},
	author = {Pearson, S. and Davison, A.W. and Reiling, K. and Ashenden, T.W. and Ollerenshaw, J.H.}
}
@article {1529,
	title = {The use of an unenclosed field fumigation system to determine the effects of elevated ozone on a grass clover mixture.},
	journal = {New Phytologist},
	volume = {129},
	year = {1995},
	pages = {23-32},
	author = {Wilbourn, S. and Davison, A.W. and Ollerenshaw, J.H.}
}
