USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Phenology Bibliography

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1973
Hopp, R. J, and B. O Blair. Plant Phenology In Eastern And Central North America: I. Development Of Networks And Preliminary Results. In Vermont Agricultural Experiment Station Bulletin . Vol. 677. Vermont Agricultural Experiment Station Bulletin . Burlington: University of Vermont, 1973.
Hopp, R. J, B. O Blair, and R. P Hickin. Plant Phenology In Eastern And Central North America: Ii. Phenological Observations On Lilac 'red Rothomagensis'. In Vermont Agricultural Experiment Station Bulletin. Vol. 678. Vermont Agricultural Experiment Station Bulletin. Burlington: University of Vermont, 1973.