1. Brown, W., “Experiments on the growth of fungi on culture media,”Ann. Bot., 1923,37, 105–129.
2. Brooks, F. T., and Moore, W. C., “Silver-leaf disease—V,”Jour. Pom. and Hort. Sci., 1926,5, 61–97.
3. Fawcett, H. S., “Gummosis of citrus,”Jour. Agric. Res., 1923,24, 191–236.
4. Leemann, A. C., “The problem of active plant immunity,”Zentralbl. fur Bakt., 1932,85, Abt. 11, 17–20 and 360–376.
5. Millard, W. A., and Taylor, C. B., “Antagonism of micro-organisms as the controlling factor in the inhibition of scab by green manuring,”Ann. Appl. Biol., 1927,14, 202–216.