Selected periodical publications of the National Investigations Committee on Aerial Phenomena (NICAP) are available here:
The UFO Investigator
Volume 1, number 1 (July 1957)
Volume 1, number 2 (August/September 1957)
Volume 1, number 3 (January 1958)
Volume 1, number 4 (June 1958)
Volume 1, number 5 (August/September 1958)
Volume 1, number 6 (December 1958)
Volume 1, number 7 (February/March 1959)
Volume 1, number 8 (June 1959)
Volume 1, number 9 (March 1960)
Volume 1, number 10 (July/August 1960)
Volume 1, number 11 (December/January 1960/1961)
Volume 1, number 12 (April/May 1961)
Volume 2, number 1 (July/August 1961)
Volume 2, number 2 (October 1961)
Volume 2, number 3 (January/February 1962)
Volume 2, number 4 (July 1962)
Volume 2, number 5 (August/September 1962)
Volume 2, number 6 (October/November 1962)
Volume 2, number 7 (January/February 1963)
Volume 2, number 8 (March/April 1963)
Volume 2, number 9 (June/September 1963)
Volume 2, number 10 (December/January 1963/1964)
Volume 2, number 11 (July/August 1964)
Volume 2, number 12 (September/October 1964)
Volume 3, number 1 (March/April 1965)
Volume 3, number 2 (April/May 1965)
Volume 3, number 3 (June/July 1965)
Volume 3, number 4 (August/September 1965)
Volume 3, number 5 (November/December 1965)
Volume 3, number 6 (January/February 1966)
Volume 3, number 7 (March/April 1966)
Volume 3, number 8 (May/June 1966)
Volume 3, number 9 (August/September 1966)
Volume 3, number 10 (October/November 1966)
Volume 3, number 11 (January/February 1967)
Volume 3, number 12 (March/April 1967)
Volume 4, number 1 (May/June 1967)
Volume 4, number 2 (October 1967)
Volume 4, number 3 (November/December 1967)
Volume 4, number 4 (January/February 1968)
Volume 4, number 5 (March 1968)
Volume 4, number 6 (May/June 1968)
Volume 4, number 7 (July/August 1968)
Volume 4, number 8 (September/October 1968)
Volume 4, number 9 (January 1969)
Volume 4, number 10 (February/March 1969)
Volume 4, number 11 (May 1969)
Volume 4, number 12 (June/July 1969)
Volume 5, number 1 (September/October 1969)
Volume 10, number 3 (June 1979)
Volume 10, number 4 (July 1979)
Volume 10, number 5 (August 1979)
Volume 10, number 6 (September 1979)
Volume 10, number 7 (October 1979)
Volume 10, number 8 (November 1979)
Volume 10, number 9 (December 1979)
Volume 11, number 1 (January 1980)
Volume 11, number 2 (February 1980)
Volume 11, number 3 (March 1980)
Volume 11, number 4 (April 1980)
UFO Quarterly Review