MacApp, C. C., (Carroll M. Capps) --The Slaves of Gree, August, 1964. (novelette) --No Friend of Gree, June, 1965. (novelette) --Gree's Damned Ones, September, 1965. (novelette) --Enemies of Gree, #106, September, 1966. (novelette) --Winter of the Llangs, #119, October, 1967. (novelette) --Hot World, #157, November-December, 1971. (novelette)
Magil, David, --One and One Are Two, #159, March-April, 1972. --The War Machine, #160, May-June, 1972. --Nine, #163, November-December, 1972. --Support Your Local Police, #166, July-August, 1973.
Magill, Rory, --The Last Gentleman, January, 1953.
Major, R. W., --Monument, March, 1960.
Malzberg, Barry, --What Time Was That? #143, December, 1969.
Margroff, Robert E., --Monster Tracks, October, 1964.
Marks, Winston, --Tabby, March, 1954. --The Test Colony, September, 1954. (novelette)
Marlowe, Stephen, --Resurrection Seven, May, 1952.
Matheson, Richard, --Brother to the Machine, November, 1952.
Mayer, Lawrence, --That Season, #137, April, 1969.
McAllister, Bruce, --The Faces Outside, July, 1963. --We Hunters of Men, August, 1965. (novelette) --Autohuman 14, #139, July, 1969.
McCaffrey, Anne, --The Ship Who Disappeared, #136, March, 1969. * (novelette)
McCarty, E. Clayton, --The Planet Player, September, 1965. (novelette)
McConnell, James, --Avoidance Situation, February, 1956. (short novel) --Nor Dust Corrupt, February, 1957.
McFadden, J. M., --The Crater, August, 1965.
McIntosh, J. T., --In a Body, July, 1960. (novelette) --Absolute Power, January, 1961. (novelette) --Snow White and the Giants (Part 1), November, 1966. --Snow White and the Giants (Part 2), December, 1966. --Snow White and the Giants (Conclusion), January, 1967. --Six Gates to Limbo (Part 1), #134, January, 1969. --Six Gates to Limbo (Conclusion), #135, February, 1969. --The Real People, #157, November-December, 1971. (novel)
McKenna, Richard M., --A. D. 2170: The Fishdollar Affair, October, 1958. (novelette) --Love and Moondogs, February, 1959.
McKimmey, James, Jr., --Pipe of Peace, May, 1953. --Celebrity, July, 1953. --Planet of Dreams, September, 1953. --The Eyes Have It, November, 1953. --'Mid Pleasures and Palaces, March, 1954. --Confidence Game, September, 1954.
McLaughlin, Dean, --See No Evil, November, 1953. --A. D. 32,000,000: Brink of Creation, October, 1958.
McLaughlin, W. I., --The Lonely Hours, #96, November, 1965.
Meredith, Richard C., --Time of the Sending, #157, November-December, 1971. (novelette)
Merwin, Sam, Jr., --The Ambassador, March, 1954. (short novel)
Michel, H. B., --Slot Machine, #105, August, 1966.
Miller, Lohr, --Paddlewheel on the Styx, #131, October, 1968. (author's first publication)
Miller, Walter, Jr., --Bitter Victory, #1, March, 1952. --It Takes a Thief, May, 1952. --Let My People Go, July, 1952. (novel) --Check and Checkmate, January, 1953. (novelette)
Mittleman, E., --The Non-Electronic Bug, July, 1960.
Morris, Howard L., --All True Believers, #115, June, 1967. (novelette)
Morrison, William, --Unwelcomed Visitor, October, 1954.
Mullen, Stanley, --Shock Treatment, September, 1952. (novelette)