Research papers SE-(series). SE-3. Instructions for using traffic counters to estimate recreation visits and use; by George A. James and Thomas H. Ripley.
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Instructions for using traffic counters to estimate recreation visits and use; by George A. James and Thomas H. Ripley.
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Research papers SE-(series). SE-3. Instructions for using traffic counters to estimate recreation visits and use; by George A. James and Thomas H. Ripley.