I parassiti vegetali delle piante coltivate od utili - Ferraris, Teodoro. (Sineo & Bo, 1913)

Part I. The living flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (Wheeling news litho. co, 1913)

Pathological plant anatomy - Küster, Ernst, 1874 -1953 (1913)

Pathologie interne - Cadéac, Célestin, 1858 -1952 (J.B. Baillière, 1909)

Pathologische Pflanzenanatomie. In ihren Grundzügen - Küster, Ernst, 1874 -1953 (G. Fischer, 1916)

Pathology and therapeutics of the domestic animals - Fröhner, Eugen, 1858 -1940 (W. L. Zuill, 1895)

Patologia vegetale. Fanerogame parassite, mixomiceti, bacterii, ifomiceti od eumiceti (funghi) - Voglino, Pietro. (Unione tipografico-editrice [Gia ditta Pomba e c], 1905)

Penny Cyclopaedia of the Society for the Diffusion of Useful Knowledge - Society for the Diffusion of Useful Knowledge (Great Britain) (Charles Knight, 1833)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)