ALLAWAY WH, 1945, SOIL SCI, V59, P207
ARNON DI, 1940, SOIL SCI, V50, P463
ARNON DI, 1942, PLANT PHYSIOL, V17, P515
ARNON DI, 1942, PLANT PHYSIOL, V17, P525
ARNON DI, 1947, SOIL SCI, V63, P159
ATTOE OJ, 1946, P SOIL SCI SOC AM, V11, P145
BARSHAD I, 1948, AM MINERALOGIST, V33, P78
BLACK CA, 1942, P SOIL SCI SOC AM, V6, P151
BOYD GE, 1947, J AM CHEM SOC, V69, P2818
BRADFIELD R, 1931, J PHYS CHEM-US, V35, P360
BRADFIELD R, 1949, ACAD POLITICAL SCI
BRAGG WL, 1937, ATOMIC STRUCTURE MIN, P17
BRAGG WL, 1948, SCIENCE, V108, P455
BROYER TC, 1947, BOTANICAL REV, V13, P1
BURD JS, 1923, J AGR SCI 3, V13, P265
BURD JS, 1924, SOIL SCI, V18, P151
BURD JS, 1939, HILGARDIA, V12, P323
BURD JS, 1948, SOIL SCI, V65, P227
CLARKE FW, 1916, US GEOL SURVEY B, V616, P115
DEAN LA, 1947, SOIL SCI, V63, P377
DEAN LA, 1947, SOIL SCI, V63, P399
ENSMINGER LE, 1941, SOIL SCI, V51, P125
EPSTEIN E, 1949, THESIS U CALIF
GAPON EN, 1933, J GEN CHEM USSR, V3, P144
GIESEKING JE, 1939, SOIL SCI, V47, P1
GOLDBERG I, 1950, THESIS U CALIF
GOLDSCHMIDT VM, 1945, SOIL SCI, V60, P1
GRIM RE, 1942, J GEOL, V50, P225
GRUNER JW, 1932, Z KRISTALLOGR, V83, P75
GUGGENHEIM EA, 1944, PROC R SOC LON SER-A, V183, P203
HAYWARD HE, 1942, P AM SOC HORTIC SCI, V41, P149
HAYWARD HE, 1946, USDA TECH B, V922, P1
HENDRICKS SB, 1930, SOIL SCI, V29, P457
HENDRICKS SB, 1938, AM MINERAL, V23, P295
HENDRICKS SB, 1942, J GEOL, V50, P276
HOAGLAND DR, 1935, 3RD INT C SOIL SC, V1, P99
HOFMANN U, 1933, Z KRISTALLOGR, V86, P340
JACKSON ML, 1948, J PHYS COLLOID CHEM, V52, P1237
JACOBSON L, 1948, SOIL SCI, V65, P129
JENNY H, 1936, J PHYS CHEM-US, V40, P501
JENNY H, 1939, SOIL SCI, V47, P257
JENNY H, 1939, SOIL SCI, V48, P443
JENNY H, 1941, FACTORS SOIL FORMATI, P252
JENNY H, IN PRESS SCIENCE
JENNY H, IN PRESS U WISCONSIN
KELLEY WP, 1931, SOIL SCI, V31, P25
KELLEY WP, 1936, SOIL SCI, V41, P367
KELLEY WP, 1942, J GEOL, V50, P307
KELLEY WP, 1948, CATION EXCHANGE SOIL, P79
KERR HW, 1938, SOIL SCI, V26, P384
KIELLAND J, 1935, J SOC CHEM IND LOND, V54, PT232
KITCHEN HB, 1948, DIAGNOSTIC TECHNIQUE
KRISHNAMOORTHY C, 1948, SCIENCE, V108, P439
KRISHNAMOORTHY C, 1949, SOIL SCI, V68, P307
KRISHNAMOORTHY C, 1950, SOIL SCI, V69, P41
LANGMUIR I, 1918, J AM CHEM SOC, V40, P1361
LEEPER GW, 1947, SOIL SCI, V63, P79
LOW PF, 1947, SOIL SCI SOC AM P, V12, P180
MAGISTAD OC, 1943, PLANT PHYSIOL, V18, P151
MAGISTAD OC, 1943, SOIL SCI, V55, P351
MARSHALL CE, 1948, SOIL SCI, V65, P57
MARTIN JC, 1945, P SOIL SCI SOC AM, V10, P94
MATTSON S, 1940, SOIL SCI, V49, P109
MEHLICH A, 1946, P SOIL SCI SOC AM, V11, P261
MURPHY HF, 1939, HILGARDIA, V12, P341
NIKIFOROFF CC, 1949, SOIL SCI, V67, P219
OVERSTREET R, 1940, P NATL ACAD SCI USA, V26, P688
PARKER FW, 1921, SOIL SCI, V12, P209
PAULING L, 1930, P NATL ACAD SCI USA, V16, P123
PEECH M, 1947, USDA757 CIRC
PIPER CS, 1942, SOIL PLANT ANAL, P192
REITEMEIER RF, 1944, SOIL SCI, V57, P119
REITEMEIER RF, 1946, SOIL SCI, V61, P195
REITEMEIER RF, 1948, SOIL SCI SOC AM P, V12, P158
RICHARDS LA, 1941, SOIL SCI, V51, P377
RICHARDS LA, 1947, DIAGNOSIS IMPROVEMEN, P1
ROTHMUND W, 1918, Z ANORG ALLG CHEM, V103, P129
RUBINS EJ, 1947, SOIL SCI, V63, P389
RUSSELL EJ, 1926, PLANT NUTRITION CROP, P72
STANDFORD G, 1946, P SOIL SCI SOC AM, V11, P155
STILES W, 1946, TRACE ELEMENTS PLANT, P1
STILLWELL CW, 1938, CRYSTAL CHEM, P417
STOUT PR, 1939, P SOIL SCI SOC AM, V4, P177
STOUT PR, 1947, SOIL SCI SOC AM P, V12, P91
STOUT PR, 1948, SCIENCE, V108, P471
THORNE DW, 1944, P SOIL SCI AM, V9, P185
TIDMORE JW, 1930, SOIL SCI, V30, P13
TRUOG E, 1930, J AM SOC AGRON, V22, P874
VAGELER P, 1930, Z PFLANZENERNAHR D A, V15, P329
VANSELOW AP, 1932, SOIL SCI, V33, P95
VEIHMEYER FJ, 1950, ANNU REV PLANT PHYS, V1, P285
VLAMIS J, 1948, SCIENCE, V107, P549
WADLEIGH CH, 1948, PLANT PHYSIOL, V23, P485
WADLEIGH CH, 1950, PLANT PHYSIOL, V25, P1
WAKSMAN SA, 1931, SOIL MICROBE, P100
WALKER RB, 1948, SCIENCE, V108, P473
WALKER RB, 1948, THESIS U CALIF
WAY JT, 1850, J R AGR SOC ENGL, V11, P313
WIEGNER G, 1927, KOLLOID Z, V42, P268
WRENSHALL CL, 1941, SOIL SCI, V51, P235