@article{Akerlof:1977dt, author = "Akerlof, C. W. and others", title = "{Measurement of $\phi$ Production in Proton - Nucleus Collisions at 400-GeV/c}", reportNumber = "FERMILAB-PUB-77-068-E", doi = "10.1103/PhysRevLett.39.861", journal = "Phys. Rev. Lett.", volume = "39", pages = "861", year = "1977" }