Illegal literature -- See Underground literature Here are entered works about publications issued clandestinely and contrary to government regulation. Works about publications issued legally (and usually serially) and produced by radical, anti-establishment, counter-culture groups are entered under Underground press publications. --subdivision Underground literature under individual wars, e.g. World War, 1939-1945--Underground literature
Illegitimate children -- See Also Unmarried mothers Here are entered works limited to mothers not married at the time of the birth of their children. Works on mothers who are single for various reasons are entered under Single mothers.