HD 30.3, 50, 58.7-.9, 62, 66 -- management, organizations and organizational behavior -- LEVEL 4
HD 4801-7269, 7790-8085 -- labor, general and U.S. (not HD 7285-7780.8 -- housing rather than labor) -- LEVEL 4
HD 8101-8943 -- labor, non-U.S. -- LEVEL 3
HF 5548.7-5549.5 -- Personnel management/human resources -- LEVEL 4
K 1701-1841 -- labor law (comparative and international)-- LEVEL 3
K 2390-2405 -- negotiated settlement and arbitration -- LEVEL 4
KF 3301-3580 -- labor law (U.S. federal law) -- LEVEL 3
KD-KE, KG-KW -- scattered areas of labor law in other countries -- LEVEL 3