COWDRY, E. V. (I925A) Studies on the etiology of heartwater. I. 

 Observations of a rickettsia, Rickettsia ruminant itun 

 (n. sp.) in the tissues of infected animals. J. exp. 

 Med., ^(2):23L.252. 



_________^__ (1925B) Idem . II, Rickettsia rvuninantium (n. sp.) 



in the tissues of ticks transmitting the disease. Ibid , 

 _£ (2): 253-274. 



__^^^______^___ (1925c) A group of microorganisms transmitted here- 



ditarily in ticks and apparently unassociated with dis- 



ease. Ibid , 41(6); 817- 830. 



(I926A) Idem. ia-12th Rep. vet. Res. S. Afr., Pt. 1, 



pp. U7-158. 



(1926B') Cytological studies on heartwater. I. The 



observation of Rickettsia ruminanti'um in the tissues of 

 infected animals^ Ibid , pp. 161^177. 



(1926c ) Idem. II . Rickettsia ruminant ium in the 



tissxies of ticks capable of transmitting the disease. 

 Ibid , pp. 181.196. 



(1927) /"Reprint of 1926A. Pretoria^/. 



COVDRY, E. V. & DATJKS, W. B. C. (1933) Studies on East Coast fever. 

 II. Behavior of the parasite and the development of 

 distinctive lesions in susceptible animals. Parasitology, 

 25(l)::i-63. 



COVIDRY, E. V. & HAM, A. W. (1930) The life cycle of the parasite 

 of East Coast fever in ticks transmitting the disease. 

 (Preliminary note). Science (1870), 72:/^6L.i^62. 



^^^^^^^^^^^^^^_^__^ (1932) Stvdies on East Coast fever. 



I. The life cycle of the parasite in ticks. Parasitology, 

 24(1): 1-49. 



CCK, H. R. (1952) The spotted fever group. In: T. M. Rivers, ed.. 

 Viral and rickettsial infections of man, pp. 611—637. 

 2d. ed., Philadelphia, London, Montreal. 



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