Blaxter, K. L. and Clapperton, J. L. 1965. Prediction of the amount of methane produced by ruminants. Br. J. Nutr. 19: 511–522.
Blaxter, K. L., Clapperton, J. L. and Martin, A. K. 1966. The heat of combustion of the urine of sheep and cattle in relation to its chemical composition and to diet. Br. J. Nutr. 20: 449–460.
Davies, P. J., Johnston, R. G. and Ross, D. B. 1971. The influence of energy intake on plasma levels of glucose, non-esterified free fatty acids and acetone in the pregnant ewe. J. agric. Sci., Camb. 77: 261–265.
Donald, H. P., Read, J. L. and Russell, W. S. 1968. A comparison trial of cross bred ewes by Finnish Landrace and sires. Anim. Prod. 10: 413–421.
Elsley, F. W. H., Bathurst, E. V. J., Bracewell, A. C., Cunningham, J. M. M., Dent, J. B., Dodsworth, T. D., MacPherson, R. M. and Walker, N. 1971. The effect of pattern of food intake in pregnancy upon sow productivity. Anim. Prod. 13: 257–269.
Gutteridge, J. M. 1968. A simple automated guiaicum glucose oxidase method. J. Med. lab. techn. 25: 385–386.
Land, R. B. and McClelland, T. H. 1971. The performance of Finn-Dorset ewes allowed to mate 4 times in 2 years. Anim. Prod. 13: 637–641.
McClelland, T. H. and Forbes, T. J. 1973. The effect of level and pattern of energy intake during late pregnancy on the performance of housed Scottish Blackface ewes. Anim. Prod. 16: 165–171.
Patterson, D. S. P. 1963. Some observations on the estimation of non-esterified fatty acid concentrations in cow and sheep plasma. Res. vet. Sci. 4: 230–237.
Reid, R. L. 1960. The determination of ketone bodies in blood. Analyst, Lond. 85: 265–271.
Robinson, J. J. and Forbes, T. J. 1968. The effect of protein intake during gestation on ewe and lamb performance. Anim. Prod. 10: 297–309.
Robinson, J. J., Fraser, C. and Bennett, C. 1971. An assessment of the energy requirements of the pregnant ewe using plasma free fatty acid concentrations. J. agric. Sci., Camb. 77: 141–145.
Hussel, A. J. F., Doney, J. M. and Gunn, R. G. 1969. Subjective assessment of body fat in live sheep. J. agric. Sci., Camb. 72: 451–454.
Russel, A. J. F., Doney, J. M. and Reid, R. L. 1967a. The use of biochemical parameters in controlling nutritional state in pregnant ewes, and the effect of undernourishment during pregnancy on lamb birth weight. J. agric. Sci., Camb. 68: 351–358.
Russel, A. J. F., Doney, J. M. and Reid, R. L. 1967b. Energy requirements of the pregnant ewe. J. agric. Sci., Camb. 68: 359–363.
Russel, A. J. F. and Foot, J. Z. 1973. The effect of level of nutrition at two stages of pregnancy on the performance of primiparous ewes. Proc. Nutr. Soc. 32: 27A-28A.
Shevah, Y. 1974. A note on the use of dexamethasone for inducement of parturition in Finn-Dorset ewes. Anim. Prod. 18: 89–92.
Snedecor, G. W. 1956. Statistical Methods, 5th ed. Iowa State University Press, Ames, Ia.
Somogyi, M. 1952. Notes on sugar determination. J. biol. Chem. 195: 19–23.
Sykes, A. R. and Field, A. C. 1972. Effects of dietary deficiencies of energy, protein and calcium on the pregnant ewe. J. agric. Sci., Camb. 78: 127–133.
Wallace, L. R. 1948. The growth of lambs before and after birth in relation to the level of nutrition. J. agric. Sci., Camb. 38: 93–153.