GRASSLAND RECORDING. I A REPORT ON AN INVESTIGATION INTO GRASSLAND RECORDING ON COMMERCIAL DAIRY FARMS, SPONSORED BY THE BRITISH GRASSLAND SOCIETY - Baker, H. K.; Baker, R. D.; Deakins, R. M.; Gould, J. L.; Hodges, J.; Powell, R. A. (Blackwell Publishing Ltd, 1964)
http://dx.doi.org/10.1111/j.1365-2494.1964.tb01152.x
Keywords: ZA-ZE