IntroductionRestricted accessIntroductionFirst published January, 1976pp. 5-5Introduction Preview abstractGet AccessAbstract
Research articleRestricted accessResearch articleFirst published January, 1976pp. 6-11Review of the Literature Preview abstractGet AccessAbstract
Research articleRestricted accessResearch articleFirst published January, 1976pp. 12-21Material and Methods Preview abstractGet AccessAbstract
Research articleRestricted accessResearch articleFirst published January, 1976pp. 22-40Results Preview abstractGet AccessAbstract
DiscussionRestricted accessDiscussionFirst published January, 1976pp. 41-48Discussion Preview abstractGet AccessAbstract
Research articleRestricted accessResearch articleFirst published January, 1976pp. 49-50Summary and Conclusions Preview abstractGet AccessAbstract
Research articleRestricted accessResearch articleFirst published January, 1976pp. 51-51Acknowledgements Seppo LähdePreview abstractGet AccessAbstract
OtherRestricted accessOtherFirst published January, 1976pp. 52-54References Preview abstractGet AccessAbstract
OtherRestricted accessOtherFirst published January, 1976pp. 55-62Appendices 1 to 8 Preview abstractGet AccessAbstract