a review of literature on the effects of different tree species and silvicultural systems on soil, flora, fauna, visual amenity, and timber production Helliwell, D. R. (Denis Rodney) creator text Chichester Philadelphia, Pa Packard Pub. Distributed by International Ideas Inc. c1982 monographic 60 p. : ill. ; 22 cm. D.R. Helliwell. Distributor stamped on t.p. Bibliography: p. 50-60. Forests and forestry Forests and forestry Bibliography SD391 .H46 1982 634.9 0906527082 0906527090 (pbk.) 83670276 UOEL 000 20150611092617.0 000