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1: Soil 2: Community 3: Article 4: Climate 5: Unconfined ground water 6: Function 7: Lactation 8: Japan 9: Contamination 10: Caterpillar 11: Characteristic 12: Particle 13: Treatment 14: Contaminant 15: Maximum mid-expiratory flow rate 16: Feeder 17: Periplaneta americana 18: Change 19: Carbon 20: Uptake (As of 21:51)
An Index period is the period of the year when measurement of an indicator yields meaningful information.
