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Cross, R. M ,  Kaplan, Colin ,  McClean, D ,  World Health Organization ,  [Studies with dried and glycerinated smallpox vaccines of full and diminished potencies / by R.M. Cross and C. Kaplan & D. McLean [sic]]

Marennikova, Svetlana ,  Malceva, N. N ,  World Health Organization. Expert Committee on Smallpox. Meeting (1964 : Geneva, Switzerland) ,  [A comparison of the properties of vaccinia virus strains used for production in various countries / by S.S. Marennikova and N.N. Malceva]

Cross, R. M ,  Kaplan, Colin ,  McClean, D ,  World Health Organization ,  [Studies with dried and glycerinated smallpox vaccines of full and diminished potencies / by R.M. Cross and C. Kaplan & D. McLean [sic]]

Marennikova, Svetlana ,  Malceva, N. N ,  World Health Organization. Expert Committee on Smallpox. Meeting (1964 : Geneva, Switzerland) ,  [A comparison of the properties of vaccinia virus strains used for production in various countries / by S.S. Marennikova and N.N. Malceva]