Bibliography

Brooks, R. R. 1972. Geobotany and bio-geochemistry in mineral exploration. 290 pp. Harper and Row, NY.

Chikishev, A. G. (ed.) 1965. Plant indicators of soils, rocks, and subsurface waters. 210 pp. Consultants Bureau, NY.

Clements, F. E. 1920. Plant indicators: the relation of plant communities to process and practice. Carnegie Inst. Wash., Publ. No. 290. 388 pp.

Cocannouer, J. A. 1964. Weeds: Guardians of the Soil. 179 pp. DeVin-Adair, NY.

Dale, H. M. 1966. Weed complexes on abandoned pastures as indicators of site characteristics. Can. J. Bot. 44: 11-17.

Dale, H. M., P. J. Harrison and G. W. Thomson. 1965. Weeds as indicators of physical site characteristics in abandoned pastures. Can. J. Bot. 43: 1319-1327.

Ferron, M., and R. Cayonette. 1975. Noms des Mauvaises Herbes du Ouébec. 3rd edn. Agr. Que. OA38 R4-4. 113 pp.

Hilgard, E. W. 1906. Soils; their formation, properties, composition, and relations to climate and plant growth in the humid and arid regions. 593 pp. Macmillan, NY.

Mueller-Dombois, D. and H. Ellenberg. 1974. Aims and Methods of Vegetation Ecology. 547 pp. Wiley, NY.

Pfeiffer, E. E. 1974. Weeds and what they tell. 96 pp. Bio-dynamic Farming and Gardening Assoc., Springfield, IL.

Rogers, L. H., O. E. Gail and R. M. Barnette. 1939. The zinc content of weeds of volunteer grasses and planted land covers. Soil Sci. 47: 237-243.

Sampson, A. W. 1939. Plant indicators-- concept and status. Bot. Rev. 5: 155-206.

Shantz, H. L. 1911. Natural vegetation as an indicator of the capabilities of land for crop production in the Great ' Plains area. U.S.D.A. Burl Pl. Ind.

Bull 201: 1-100.

Shewell-Cooper, W. E. 1975. Soil Humus and Health; an Organic Guide. David and Charles, Newton Abbot, Engl.

Soil Association. 1975. The value of weeds. 2nd edn. 22 pp. Soil Assoc. Walnut Tree Manor, Haughley, Suffolk, Engl.

Additional References for Identifying Weeds

Frankton, C. and G. A. Mulligan. 1970. Weeds of Canada. 2nd edn. 217 pp. Can. Dept. Agric. Publ. 948. Can. Dept. Agric., Ottawa.

Isely, D. 1960. Weed identification and control in the North Central States. 400 pp. Iowa St. U. Pr., Ames, lo.

Jacques, H. E. 1959. How to know the weeds, 230 pp. Brown, Dubuque, lo.

Marie-Victorin, Frère. 1964. Flore Laurentienne. 2nd edn. 925 pp. Presses de ['Univ. Montréal, Montréal, Oue.

Peterson, R. T. and M. McKenny. 1968. A field guide to the wildflowers of Northeastern and North Central North America. 420 pp. Houghton Mifflin Boston, MA.

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McGill Publications