Seven referendums were held in Switzerland in 1987. The first four were held on 5 April on amendments to the laws on asylum and foreign residents (both approved), a popular initiative "for the people's co-determination of military expenditure" (rejected) and a federal resolution on the voting system for popular initiatives that also have counter-proposals (approved).
The last three were held on 6 December on a federal resolution on the Rail 2000 project (approved), an amendment to the federal law on health insurance (rejected) and a popular initiative "for the protection of fens - Rothenthurm Initiative" (approved).
References
Swiss referendums, 1987 Wikipedia(Text) CC BY-SA