- Leopold, Werner F., 1896- (4)
- Piaget, Jean, 1896-1980 (3)
- Church, Joseph (2)
- Claparède, Edouard, 1873-1940 (2)
- Fletcher, Paul J. (2)
- Garman, Michael (2)
- Golubkov, V., 1880-1968 (2)
- Lenneberg, Eric H. (2)
- Slobin, Dan Isaac, 1939- (2)
- Antolín, Mariano (1)
- Augst, Gerhard, 1939- (1)
- Bauer, Andrea, 1953- (1)
- Bellugi, Ursula, 1931- (1)
- Bloom, Lois (1)
- Brown, Roger William, 1925- (1)
- Chukovskiĭ, K. I. (Korneĭ Ivanovich) (1)
- Cohen, Marcel (1)
- Conference on First-Language Acquisition (1)
- Elliot, Alison J. (1)
- Ferguson, Charles Albert, 1921- (1)
- Fisher, Eunice (1)
- Gabain, Marjorie (1)
- Gabain, Ruth (1)
- Jakobson, Roman, 1896-1982 (1)
- Karpova, Sofʹi︠a︡ Nikolaevna (1)
- Klaster-Ungureanu, Grete (1)
- Lawton, Denis, 1931- (1)
- Lock, Andrew (1)
- MacLeod, Robert B. (1)
- Menyuk, Paula (1)
- Open University (1)
- Pregel, Dietrich (1)
- Richards, Jill (1)
- Rickheit, Gert, 1941- (1)
- Schaerlaekens, A. M. (1)
- Slama-Cazacu, Tatiana (1)
- Social Science Research Council (U.S.). Committee on Intellective Processes Research (1)
- Society for Research in Child Development (1)
- Stein, Anette, 1955- (1)
- Stubbs, Michael, 1947- (1)
- Swann, Joan (1)
- Wade, Barrie (1)
- Watts, A.F. (1)
- Willes, Mary J. (1)