38. G. Antonuccl, Ind vernlce (Milan) 6, 217-18 (1952); Chem. Abstracts 

 47, 4125e (1953). 



39. A. Pozzi, Italian Patent 473,827 (1952); Chem. Abstracts 48, 

 9075c (1954). 



40. Badische Anilln- und Soda Fabrik, German Patent 1,226,527 (1966); 

 Chem. Abstracts 66, 11811d (1967). 



41. H. Enders, H. Singer, and T. Stenzinger, French Patent 1,522,068 

 (1968); Chem. Abstracts 71, 14146e (1969). 



42. L. H. Wilson, U. S. Patent 2,769,712 (1956); Chem. Abstracts 51, 

 4748c (1956). 



43. G. Barsky and F. A. Strauss, U. S. Patent 2,548,416 (1951); Chem. 

 Abstracts 45, 5975 (1951). 



44. G. Barsky and F. A. Strauss, U. S. Patent 2,576,711 (1951); Chem. 

 Abstracts 46, 1806a (1952). 



45. F. J. Brockman, Canadian Patent 661,135 (1963); Chem. Abstracts 

 59, 11276b (1963). 



46. Lakk es Feste kipari Vallalat , Hungarian Patent 151,536 (1964); 

 Chem. Abstracts 61, 13494b (1964). 



47. A. P. Dunlop and E. L. Washburn, U. S. Patent Application 

 604,081. Official Gaz. 628, 1530 (1949); Chem. Abstracts 44, 

 1116 7h (1950). 



48. C. H. Coney and R. M. Simons, U. S. Patent 3,282,716 (1966); Chem. 

 Abstracts 66, 19992J (1967). 



49. G. S. Petrov and E. N. Rassadina, USSR Patent 66,695 (1946); 

 Chem. Abstracts 42, 52731 (1948). 



50. R. Steele and L. E. Giddings,Jr. , Ind. Eng. Chem. 48, 

 110-14 (1956). 



51. H. Bisle, German Patent 1,195,657 (1965); Chem. Abstracts 63, 

 1601c (1965). 



52. Badishche Anilin- und Soda Fabrik, German Patent 840,542 (1952); 

 Chem. Abstracts 49, 12856a (1955). 



53. J. McBride, U. S. Patent 2,524,986 (1950); Chem. Abstracts 45, 

 1388d (1951). 



