Holdings
29.1952,264 - 267; 30.1953,163 - 31.1954,68 - 168; 35.1958 - 59.1982,59
Holdings gaps
[N=1953,164-210,212-213,215,219,221,223-224,227,230-249,251-270,273-274,276-287,290; 1954,69-74,76-99,101-122,124-128,130-149,151-155,157-161,163-167; 1963,224,275,276,278; 1964,9,174-179; 1965,175,206-224; 1966,171-271; 1967,269; 1968,173-234,292,293; 1969,171,241; 1970,8,46,199,228; 1972,38,44; 1973,122; 1975,173; 1980,5,181; 1981,286; 1982,53,55]