On-site determination of vegetational injuries; interpretation keys to evaluate aerial CIR-photographs for the assessment of crown conditions of coniferous and deciduous trees; spruce, beech, oak, and pine
现场确定植物损伤；用于评估针叶树和落叶树树冠状况的航空CIR照片的解释键；云杉、山毛榉、橡树和松树

1993-10-01