van den Tweel, Peter
- An Experimental Low Thinning in a Young Hardwood Stand. Includes Resampling of Permanently Established Plots (Formerly Exp. 56-2 in Active Research Files). 1956-1987
- Intermediate cuttings in even-aged mixed hardwood (Tom Swamp I) with special reference to thinning: 50 years data. 1978
- Intermediate cuttings in even-aged mixed hardwood with special reference to thinning. 1933-1978