Kalandra, A., and A. Pfeffer. 1946. Smernice ochrany proti lykozroutu smrkovemu Ips typographus L. [Ministerielle Richtlinien zum Schutze gegen den Fichtenborkenkafer Ips typographus L.]. Min. zemedelstvi, Praha 1946:6.
Kalandra & Pfeffer 1946
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