"tryrrell, g w. "
the principles of perrology: / g.w. tryrrell - 1 ed. - uk : chapman and hall 1926. - "xii, 349p.; 19 cm."
552. tyr
the principles of perrology: / g.w. tryrrell - 1 ed. - uk : chapman and hall 1926. - "xii, 349p.; 19 cm."
552. tyr