Ahlgren, C. E. (1968). Breeding for resistance to white pine blister rust. Quetico-Superior Wilderness Research Center.
Chicago Style (17th ed.) CitationAhlgren, C. E. Breeding for Resistance to White Pine Blister Rust. Ely, Minn.: Quetico-Superior Wilderness Research Center, 1968.
Cita MLAAhlgren, C. E. Breeding for Resistance to White Pine Blister Rust. Quetico-Superior Wilderness Research Center, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.