@article {18398,
	title = {Interactive PL/1},
	journal = {SIGPLAN Not.},
	volume = {9},
	year = {1974},
	month = {1974/09//},
	pages = {29 - 32},
	abstract = {An investigation of the PL/1 language in an interactive environment has lead to the discovery of several deficiencies in the language when used as a pedagogical tool. How these deficiencies were eliminated (or avoided) in one particular implementation is discussed.},
	isbn = {0362-1340},
	doi = {10.1145/953214.953218},
	url = {http://doi.acm.org/10.1145/953214.953218},
	author = {Zelkowitz, Marvin V}
}
