Measuring the distribution of animals in relation to the environment / 
D. Western and J. J. R. Grimsdell. 
 - red. 2nd ed. 
 - Nairobi :  African Wildlife Leadership Foundation,  1979. 
 - 64 p. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Techniques.