124 HUGO SJORS 



HusTiCH, I. (1939). Notes on the coniferous forest and tree limit on the east coast of 



Newfoundland-Labrador. Acta Geogr. 7 (1), 1-77. 

 HusTiCH, I. (1949). On the forest geography of the Labrador peninsula. A preliminary 



synthesis. Acta Geogr. 10 (2), 1-63. 

 HusTiCH, I. (1951). The lichen woodlands in Labrador and their importance as winter 



pastures for domesticated reindeer. Acta Geogr. 12 (1), 1-48. 

 HusTiCH, L (1952). Barrtradsarternas polara grans pa norra halvklotet. Comin. Inst. 



Forest. Fenn. 40, 29, 1-20. 

 HuSTiCH, L (1957). On the phytogeography of the Subarctic Hudson Bay Lowland. Acta 



Geogr. 16(1), 1^8. 

 HusTiCH, L (1960). Plant geographical regions. In A Geography of Norden. Oslo. 

 Jalas, J. (1957). Die geobotanische Nordostgrenze der sog. Eichenzone Siidwestfinnlands. 



Ann. Bot. Soc. Vanamo 29 (5), 1-32. 

 Kalela, a. (1958). tJber die Waldvegetationszonen Finnlands. Bot. Notiser 111, 353-368. 

 Kalela, a. (1961). Waldvegetationszonen Finnlands und ihre klimatischen Paralleltypen. 



Arch. Soc. Vanamo 16 (suppl.), 65-83. 

 Kujala, V. (1936). Tutkimuksia Keski- ja Pohjois-Suomen valisesta kasvillisuusrajasta. 



Conim. Inst. Forest. Fenn. 13. 

 Lavrenko, E. M. and Sochava, V. B. (ed.) (1954). Geobotanicheskaya karta SSSR, scale 



1 :4,000,000. Akad. Nauk Moskva-Leningrad. 

 McVean, D. N. and Ratcliffe, D. A. (1962). Plant communities of the Scottish Highlands. 



Monogr. Nat. Conservancy 1. 

 NoRDHAGEN, R. (1936). Vcrsuch einer neuen Einteilung der subalpinen-alpinen Vegetation 



Norwegens. Bergens Miis. Arb. 1936, Naturv. Rekke 7, 1-88. 

 NoRDHAGEN, R. (1943). Sikilsdalcn og Norges fjellbeiter. Bergens Mus. Skr. 22, 1-607. 

 PoLUNiN, N. (1951). The Real Arctic: suggestions for its delimitation, subdivision and 



characterization. J. Ecol. 39, 308-315. 

 PoRSiLD, A. E. (1951). Botany of southeastern Yukon adjacent to the Canol Road. Nat. 



Mus. Canada Bull. Ill, 1-400. 

 Regel, C. (1950). Dynamik von Klima und Pflanzendecke in Nordeuropa. Ber. Geobot. 



Forsch.-Inst. Riibel 1949, 11-23. 

 Regel, C. (1952). Botanische Betrachtungen auf einer Reise in Schweden. Ber. Geobot. 



Forsch.-Inst. Riibel 1951, 35-55. 

 Ritchie, J. C. (1956). The vegetation of northern Manitoba. I. Studies in the southern 



spruce forest zone. Canad. J. Bot. 34, 523-561. 

 Ritchie, J. C. (1959). The vegetation of northern Manitoba. III. Studies in the Subarctic. 



Arct. Inst. N. Am. Techn. Paper 3, 1-56. 

 Ritchie, J. C. (1960). The vegetation of northern Manitoba. V. Establishing the major 



zonation. Arctic 13, 210-229. 

 Rousseau, J. (1952). Les zones biologiques de la peninsule Quebec-Labrador et Themi- 



arctique. Canad. J. Bot. 30, 436^74. 

 RowE, J. S. (1959). Forest regions of Canada. Canada Dept. North. A_tf. and Nat. Resourc, 



Forest. Branch Bull. 123, 1-71, map: Forest classification of Canada 1957. 

 Shantz, H. L. and Zon, R. (1924). The natural vegetation of the United States. Atlas of 



Am. Agric. I. E. 

 Sjors, H. (1950). Regional studies in north Swedish mire vegetation. Bot. Notiser 1950, 



173-222. 

 Sjors, H. (1955). Remarks on ecosystems. Svensk Bot. Tidskr. 49, 155-169. 

 Sjors, H. (1956). Nordisk vdxtgeografi. Stockholm. 



Sjors, H. (1959). Bogs and fens in the Hudson Bay lowlands. Arctic 12, 2-19. 

 Sjors, H. (1961a). Forest and peatland at Hawley Lake, northern Ontario. Nat. Mus. 



Canada Bull. Ill, 1-31. 

 Sjors, H. (1961b). Surface patterns in Boreal peatland. Endeavoin- 20, 217-224. 

 Sjors, H. (in prep.): Bogs and fens on Attawapiskat River, northern Ontario. Nat. Mus. 



Canada Bull. 

 Sotchava, V. B. (1954). Les principes et les problemes de la cartographic geobotanique. 



Essais de Botanique I, 273-288. 



