Klimakteričeskij period /
Jurskij period /
British union-catalogue of periodicals. New periodical titles.
Ulrichs periodicals directory.
Business periodicals collection.
Academic periodicals collection.
The periodic table of the elements /
The Standard Periodical Directory 1967
The art of the migration period /
NMR and the periodic table /
Optimal periodic control /
World medical periodicals /
Četvertičnyj period Sibiri.
Stability theory and the existence of periodic solutions and almost periodic solutions /
Zapadnaja Sibir v jurskom periode /
Ríša periodicity. : Putovanie krajinou chemických prvkov. /
O klimatach i landšaftach prošlogo. Vypusk 2.
British union - catalogue of periodicals incorporating world list of scientific periodicals : new periodical titles 1960-1968 /
Sovetskoje zakonodateľstvo v period stroiteľstva kommunizma /
Relationships and Mechanisms in the periodic table /
Prirodnaja obstanovka i fauny prošlogo. Vyp. 1 /
O lednikovom periode. Vypusk 4, Proischoždenije valunnych otloženij /