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- [2] NET CARBON-DIOXIDE EXCHANGE OF WHEAT, SORGHUM, AND SOYBEAN CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE, 1975, 53 (04): : 382 - 389
- [9] CARBON-DIOXIDE AND CLIMATE - A REVIEW CANADIAN GEOGRAPHER-GEOGRAPHE CANADIEN, 1985, 29 (01): : 74 - 85