A travel cost analysis of nonconsumptive wildlife-associated recreation in the United States. Zawacki, W. & Marsinko, A. Forest Science, 46(4):496–506, 2000.
bibtex   
@article{zawacki_travel_2000,
	title = {A travel cost analysis of nonconsumptive wildlife-associated recreation in the {United} {States}.},
	volume = {46},
	language = {en},
	number = {4},
	journal = {Forest Science},
	author = {Zawacki, W.T. and Marsinko, A.},
	year = {2000},
	pages = {496--506},
}

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