918. Some progress with the chick embryo technique: McLaughlin, J., Jr., Marliac, J.-P., Verrett, M. Jacqueline & Fitzhugh, O. G. (1965). Toxicity of some food additive chemicals as measured by the chick embryo technique. Toxic appl. Pharmac.7, 491. Abaza, R., Denney, A., Millar, H. C. & Greenwood, D. A. (1965). Toxicity and biological effects of 1,2-benzpyrene, 1,2,5,6-dibenzanthracene and 3-methylcholanthrene in the chick embryo. Toxic. appl. Pharmac.7, 478. Ghadiri, M. & Greenwood, D. A. (1965). Toxicity and biological effects of malathion, phosdrin, and sevin in the chick embryo. Toxic. appl. Pharmac.7, 484. Marliac, J.-P., Verrett, M. Jacqueline, McLaughlin, J., Jr. & Fitzhugh, O. G. (1965). A comparison of toxicity data obtained for twenty-one pesticides by the chicken embryo technique with acute, oral LD50's in rats. Toxic. appl. Pharmac.7, 490. Khera, K. S., LaHam, Q. M. & Grice, H. C. (1965). Toxic effects induced by inoculation of EPN and Systox into duck eggs. Toxic. appl. Pharmac.7, 488