Heusser, Calvin J.. "A PLEISTOCENE PHYTOGEOGRAPHICAL SKETCH OF THE PACIFIC NORTHWEST AND ALASKA".
The Quaternary of the U.S., Princeton: Princeton University Press, 1965, pp. 469-484.
https://doi.org/10.1515/9781400876525-028Heusser, C. (1965). A PLEISTOCENE PHYTOGEOGRAPHICAL SKETCH OF THE PACIFIC NORTHWEST AND ALASKA. In
The Quaternary of the U.S. (pp. 469-484). Princeton: Princeton University Press.
https://doi.org/10.1515/9781400876525-028Heusser, C. 1965. A PLEISTOCENE PHYTOGEOGRAPHICAL SKETCH OF THE PACIFIC NORTHWEST AND ALASKA.
The Quaternary of the U.S.. Princeton: Princeton University Press, pp. 469-484.
https://doi.org/10.1515/9781400876525-028Heusser, Calvin J.. "A PLEISTOCENE PHYTOGEOGRAPHICAL SKETCH OF THE PACIFIC NORTHWEST AND ALASKA" In
The Quaternary of the U.S., 469-484. Princeton: Princeton University Press, 1965.
https://doi.org/10.1515/9781400876525-028Heusser C. A PLEISTOCENE PHYTOGEOGRAPHICAL SKETCH OF THE PACIFIC NORTHWEST AND ALASKA. In:
The Quaternary of the U.S.. Princeton: Princeton University Press; 1965. p.469-484.
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