616.C1 G Gay, Frederick Parker, 1874- Agente of disease and host resistance, in- cluding the principles of inmunclogy, bacterio- logy, mycology, protosoology, parasitology and virus diseases, by Frederick P. Gay, in asso- ciation with George W. Bachnan, Rhode H. Bonham, Leon Buchbinder. [and others] Sprin- gfield, I11«, Baltimore Md, C. C. Thomas [cl953] xii, 1581 p. , 1 1. illus. , vi col. pi. (1 double) diagrs. 27 cm.