The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is one -twentieth of an atmosphere . If a diver
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PDF) Sampling Characteristics and Calibration of Snorkel Counts to Estimate Stream Fish Populations
Sampling Characteristics and Calibration of Snorkel Counts to Estimate Stream Fish Populations - Weaver - 2014 - North American Journal of Fisheries Management - Wiley Online Library