Weir, J. R. (1915). A new leaf and twig disease of Picea Engelmanni: A preliminary report. Government Printing Office.
Chicago-Zitierstil (17. Ausg.)Weir, James R. A New Leaf and Twig Disease of Picea Engelmanni: A Preliminary Report. Washington, D. C: Government Printing Office, 1915.
MLA-Zitierstil (9. Ausg.)Weir, James R. A New Leaf and Twig Disease of Picea Engelmanni: A Preliminary Report. Government Printing Office, 1915.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.