Champion, H. (2023). An investigation of certain factors concerning the resin-tapping industry in Pinus longifolia. Superintendent Government Printing.
Chicago-čujuhus (17. p.)Champion, H.G. An Investigation of Certain Factors Concerning the Resin-tapping Industry in Pinus Longifolia. Superintendent Government Printing, 2023.
MLA-čujuhus (9. p.)Champion, H.G. An Investigation of Certain Factors Concerning the Resin-tapping Industry in Pinus Longifolia. Superintendent Government Printing, 2023.
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