1. 2) A. C. Rose: Present status of subgrade studies. Public Roads, 6 (1925), No.7, p. 137. A. M. Wintermyer: Percentage of water freezable in soils. Public Roads, 5 (1925), No.12, p. 5. Stephen Taber: Freezing and thawing of soils as factors in the destruction of road pavements. Public Roads, 11 (1930), No.6, p. 113. J. A. Sourwine: A method of analysis of data on frost occurrance for url in high way design. Public Roads, 11 (1930), No.3, p. 51. Ira B. Mullis: Illustrations of frort and ice ph nomena. Public Roads, 11 (1930), No.4, p. 61. Henry Aaron: Frost heave in highways and its prevention. Public Roads, 15 (1934), No.1, p. 10. Burton and Benkelman: Frost in road subgrades. Eng. News-Record, 106 (1931), 266. C. L. Moth: Curing Minnesota frost boils by drains. Eng. News-Record, 106 (1931) 270. Remedy of frost heaves on highways. Eng. News-Record, 112 (1934), 509.
2. 1) Stephen Taher: Frost heaving. J. of Geology, 37 (1929), 428. Stephen Taher: The mechanics of frost heaving. J. of Geology, 38 (1930), 303.