FACTORS OF SOIL FORMATION A SYSTEM OF QUANTITATIVE PEDOLOGY
1994 年出版299 页ISBN:0486681289
SPOT DRILLS LOW INTERMEDIATE ILLUSTRATED GRAMMAR EXERCISES
1983 年出版130 页ISBN:0194341259
WEBER AND RICKERT:CONCEPT FORMATION IN THE CULTURAL SCIENCES
GUY OAKES1988 年出版192 页ISBN:0262650371