Ivins, J. D. <br/><br/>
The measurement of grassland productivity :  proceedings of the University of Nottingham, Sixth Easter School in Agricultural Science, 1959. 

 - London :  Butterworth,  1959. 
<br/><br/>Incluye bibliografía. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pastizales
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Reino Unido
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Texto