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Ostrofsky, Benjamin. (1977). Design, planning, and development methodology . : Prentice-Hall, Inc.

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Ostrofsky, Benjamin. Design, planning, and development methodology. : Prentice-Hall, Inc, 1977. Text.

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Ostrofsky, Benjamin. Design, planning, and development methodology. : Prentice-Hall, Inc, 1977. Text.

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Ostrofsky, Benjamin. Design, planning, and development methodology. : Prentice-Hall, Inc, 1977. Print.